Jwt Attack

Signature verification bypass in wolfSSL's ECCSI implementation allows adjacent network attackers to forge cryptographic signatures for any message and identity without authentication. The wc_VerifyEccsiHash function fails to validate that signature scalars r and s fall within the required mathematical range [1, q-1], enabling attackers with knowledge of public constants to craft universally-valid forged signatures. This defeats the cryptographic integrity guarantees of ECCSI-signed data, particularly affecting JWT authentication systems and identity-based cryptographic protocols. No public exploit identified at time of analysis.

Signature verification bypass in BSV Ruby SDK versions 0.3.1 through 0.8.1 allows authenticated attackers to forge blockchain identity certificates. The WalletClient#acquire_certificate method persists certificates without validating certifier signatures in both 'direct' acquisition (where attackers supply all fields including forged signatures) and 'issuance' protocols (where malicious certifier endpoints inject invalid signatures). Forged certificates appear authentic to list_certificates and prove_certificate operations, enabling impersonation attacks. CVSS 8.1 (AV:N/AC:L/PR:L/UI:N) reflects network-accessible exploitation requiring low-privilege authentication. No public exploit identified at time of analysis.

LightRAG API authentication can be bypassed via JWT algorithm confusion attack, where an attacker forges tokens by specifying 'alg': 'none' in the JWT header to impersonate any user including administrators. The vulnerability exists in the validate_token() method in lightrag/api/auth.py (line 128), which accepts the unsigned 'none' algorithm despite not explicitly permitting it, allowing unauthenticated remote attackers to gain unauthorized access to protected resources. Publicly available proof-of-concept code demonstrates the attack; vendor has released a patch addressing the root cause of improper algorithm validation.

JWT secret key brute-forcing in Parisneo Lollms 2.1.0 allows unauthenticated remote attackers to forge administrative tokens and achieve full system compromise. The application uses a weak secret for signing JSON Web Tokens, enabling offline attacks to recover credentials and escalate privileges to administrator level. With CVSS 9.8 (critical network-accessible attack requiring no privileges) and EPSS data unavailable, this represents a severe authentication bypass in AI/LLM management software. Fixed in version 2.2.0. No public exploit identified at time of analysis, though the attack technique (JWT cracking) is well-documented.

LightRAG's JWT authentication can be bypassed via a hardcoded default secret 'lightrag-jwt-default-secret' when TOKEN_SECRET is not configured. Unauthenticated attackers can forge valid tokens to access protected API endpoints in installations running v1.4.10 with AUTH_ACCOUNTS enabled but TOKEN_SECRET unset. CVSS 7.5 (High) reflects network-accessible confidentiality breach with no authentication required. No public exploit identified at time of analysis, though the hardcoded secret is publicly documented in the vulnerability disclosure. EPSS data not available for this CVE.

Denial of service in rust-rpm-sequoia allows local attackers to crash RPM signature verification by submitting specially crafted RPM files that trigger unhandled errors in OpenPGP parsing, preventing legitimate package management operations. CVSS 4.0 (low severity), local attack vector, non-authenticating. No public exploit code or active exploitation confirmed.

Authentication bypass in OneUptime SAML SSO implementation allows authenticated attackers to impersonate arbitrary users by exploiting XML signature verification logic flaws. Affected versions prior to 10.0.42 decouple signature validation from identity extraction, enabling XML injection attacks where an unsigned assertion with attacker-controlled identity precedes a legitimately signed assertion. EPSS and exploitation signals indicate publicly available exploit code exists with moderate technical complexity (CVSS AC:L, PR:L). No confirmed active exploitation (not in CISA KEV).

Finite-field Diffie-Hellman (FFDH) in Mbed TLS 3.5.x, 3.6.0 through 3.6.5, and TF-PSA-Crypto 1.0 lacks contributory behavior due to improper validation of peer-supplied parameters, allowing an attacker to restrict the shared secret to a small set of predictable values. While the vulnerability does not directly impact TLS (which does not depend on contributory behavior), it poses a significant risk to protocols that do rely on this property, including those where an active network attacker or malicious peer can exploit the weakness. No CVSS score or public exploit code has been assigned at the time of analysis.

JWT token forgery in appsup-dart/jose library (versions prior to 0.3.5+1) enables remote attackers to bypass authentication by embedding attacker-controlled public keys in JOSE headers. The library incorrectly accepts header-supplied 'jwk' parameters as trusted verification keys without validating they exist in the application's trusted keystore, allowing unauthenticated attackers to sign arbitrary tokens with their own key pairs. EPSS data not available; no public exploit identified at time of analysis, though exploitation requires only standard JWT manipulation tools.

Botan cryptography library versions 3.0.0 through 3.10.x fail to verify OCSP response signatures during X.509 certificate path validation, allowing attackers to forge certificate status responses and potentially bypass revocation checks. This integrity bypass affects any application using Botan for TLS or certificate validation and requires network positioning but not authentication. The vulnerability was patched in version 3.11.0.

Zebra cryptocurrency nodes prior to version 4.3.0 can be forced into consensus split by malicious miners who craft blocks containing V5 transactions with matching txids but invalid authorization data. The vulnerability stems from a cache lookup that used ZIP-244 txid (which excludes authorization data) to bypass full verification, allowing nodes to accept blocks with invalid signatures. While this does not enable invalid transaction acceptance, it isolates vulnerable nodes from the Zcash network, creating fork conditions exploitable for service disruption and potential double-spend scenarios against partitioned nodes. No public exploit code or CISA KEV listing exists, but the technical complexity is low for actors with mining capabilities. Affected products are zebrad and zebra-consensus Rust packages supporting Network Upgrade 5 (V5 transactions). Vendor-released patch: Zebra 4.3.0.

Authentication bypass in OpenClaw's Feishu webhook integration (pre-2026.3.12) allows unauthenticated remote attackers to inject forged events and trigger arbitrary downstream tool execution. The vulnerability occurs when administrators configure only verificationToken without encryptKey, enabling attackers to craft malicious webhook payloads that bypass validation. No public exploit identified at time of analysis, though CVSS 8.8 reflects network accessibility (AV:N), zero complexity (AC:L), and no privileges required (PR:N).

The digitalbazaar/forge npm package accepts forged Ed25519 signatures due to missing scalar canonicalization checks, allowing authentication and authorization bypass in applications that rely on signature uniqueness. All versions since Ed25519 implementation are affected (confirmed through version 1.3.3), identified as pkg:npm/node-forge. Publicly available exploit code exists with a complete proof-of-concept demonstrating how attackers can create multiple valid signatures for the same message by adding the group order L to the scalar component S, bypassing deduplication, replay protection, and signed-object canonicalization checks. The vendor has released a patch via commit bdecf11571c9f1a487cc0fe72fe78ff6dfa96b85.

XML Digital Signature validation in the russellhaering/goxmldsig Go library can be bypassed due to a loop variable capture bug affecting versions prior to 1.6.0. Unauthenticated remote attackers can exploit this flaw to manipulate signature validation by crafting XML documents with multiple references in the SignedInfo block, causing the validator to use the wrong reference and accept invalid signatures. The CVSS score of 7.5 reflects high integrity impact with network attack vector and low complexity (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N), though no public exploit has been identified at time of analysis.

A downgrade vulnerability affecting Intel-based Mac computers allows malicious applications to bypass code-signing restrictions and access user-sensitive data. The vulnerability impacts macOS Sequoia (versions before 15.7.5), macOS Sonoma (versions before 14.8.5), macOS Tahoe (versions before 26.3 and 26.4), and affects all Intel-based Mac systems running vulnerable versions. An attacker can craft an application that exploits insufficient code-signing validation to downgrade security protections and exfiltrate sensitive user information.

A cryptographic signature verification vulnerability exists in the jsrsasign JavaScript library before version 11.1.1 that allows attackers to forge DSA signatures and X.509 certificates. The vulnerability affects DSA domain-parameter validation in KJUR.crypto.DSA.setPublic, enabling complete bypass of signature verification by supplying malicious domain parameters (g=1, y=1, r=1). A proof-of-concept exploit is publicly available (CVSS:3.1 E:P rating) demonstrating active exploitation feasibility, though the attack complexity is rated high and no KEV listing indicates limited widespread exploitation to date.

PuTTY versions up to 0.83 contain a weak authentication vulnerability in the Ed25519 signature verification function (eddsa_verify in crypto/ecc-ssh.c) that allows remote attackers to potentially forge or manipulate digital signatures due to improper validation of Ed25519 signature components. While a public proof-of-concept exploit exists and the vulnerability affects signature verification, the real-world impact remains unproven, with CVSS 3.7 (low severity) and EPSS probability indicating exploitation is difficult and requires high complexity. The vendor (PuTTY developers) has already released a patch addressing this issue.

A cryptographic signature verification flaw exists in tinyssh's Ed25519 signature handler (crypto_sign_ed25519_tinyssh.c) that allows improper validation of signatures, potentially enabling an attacker to forge or bypass signature checks. Affected versions of janmojzis tinyssh up to 20250501 are impacted, with the vulnerability requiring local execution and high attack complexity. A public exploit has been disclosed, and vendor patches are available in version 20260301.

A cryptographic authentication bypass vulnerability in ConnectWise ScreenConnect allows remote attackers who gain access to server-level cryptographic material to authenticate as any user and obtain elevated privileges. The vulnerability affects all ScreenConnect versions prior to 26.1 and carries a CVSS score of 9.0, indicating critical severity. While not currently listed in CISA's KEV catalog and with no public proof-of-concept available, the vulnerability's authentication bypass nature and potential for complete system compromise make it a high-priority patching target.

A cryptographic vulnerability in the Stanford Javascript Crypto Library (SJCL) allows attackers to recover victims' ECDH private keys through a missing point-on-curve validation flaw. The vulnerability affects all versions of SJCL and enables remote attackers to send specially crafted off-curve public keys and observe ECDH outputs to extract private key material. A proof-of-concept exploit is publicly available, though the vulnerability is not currently listed in CISA KEV and has no EPSS score assigned yet.

A critical authentication bypass vulnerability in authlib's JWT signature verification allows attackers to forge arbitrary tokens by injecting their own cryptographic keys through the JWT header. The flaw affects all versions of authlib prior to 1.6.9 when applications use key resolution callbacks that can return None (common in JWKS-based authentication flows). A working proof-of-concept exists demonstrating complete authentication bypass, enabling attackers to impersonate any user or assume administrative privileges without valid credentials.

A security vulnerability in HCL AION (CVSS 4.8). Remediation should follow standard vulnerability management procedures.

Galaxy Store prior to version 4.6.03.8 contains an improper cryptographic signature verification vulnerability that allows a local attacker to install arbitrary applications without proper authorization. An attacker with physical or local access to a device can bypass the signature validation mechanism, enabling installation of malicious or unauthorized apps. While the CVSS score of 5.9 is moderate, the integrity impact is high, making this a meaningful threat to device security and app ecosystem integrity.

Smart Switch prior to version 3.7.69.15 contains an improper cryptographic signature verification vulnerability that allows remote attackers to bypass authentication mechanisms. The vulnerability has a CVSS score of 5.3 with network-based attack vector and low complexity, requiring only user interaction. While no public exploit or KEV status has been confirmed, the authentication bypass capability presents a moderate risk for unauthorized access to affected devices.

This vulnerability involves improper cryptographic signature verification in the Font Settings component of Samsung devices prior to the March 2026 Security Update Release 1. A physical attacker can bypass signature validation to install custom fonts, potentially leading to integrity compromise of system font resources. While the CVSS score is moderate at 5.1, the attack requires physical access and user interaction, limiting real-world exploitation frequency.

XML-Sig versions 0.27 through 0.67 for Perl incorrectly validates XML files if signatures are omitted. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. Rated high severity (CVSS 7.0), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

Improper verification of cryptographic signature in the installer for Zoom Workplace VDI Client for Windows may allow an authenticated user to conduct an escalation of privilege via local access. Rated high severity (CVSS 7.5). No vendor patch available.

Evervault is a payment security solution. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

In JetBrains ReSharper before 2025.2.4 missing signature verification in DPA Collector allows local privilege escalation. Rated high severity (CVSS 8.4), this vulnerability is low attack complexity. No vendor patch available.

Improper authentication in the API authentication middleware of HCL DevOps Loop allows authentication tokens to be accepted without proper validation of their expiration and cryptographic signature. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.

A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

There is a vulnerability in the Supermicro BMC firmware validation logic at Supermicro MBD-X12STW . Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

There is a vulnerability in the Supermicro BMC firmware validation logic at Supermicro MBD-X13SEM-F . Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Linkr is a lightweight file delivery system that downloads files from a webserver. Rated critical severity (CVSS 9.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

A vulnerability in the installation process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR Software image signature verification and load unsigned. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. No vendor patch available.

E3 Site Supervisor Control (firmware version < 2.31F01) firmware upgrade packages are unsigned. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

An insufficiently secured internal function allows session generation for arbitrary users. Rated high severity (CVSS 8.8). No vendor patch available.

gnark is a zero-knowledge proof system framework. Rated high severity (CVSS 8.6), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A potential vulnerability was reported in the Lenovo 510 FHD and Performance FHD web cameras that could allow an attacker with physical access to write arbitrary firmware updates to the device over a. Rated high severity (CVSS 7.0), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

A vulnerability has been identified in Mendix SAML (Mendix 10.12 compatible) (All versions < V4.0.3), Mendix SAML (Mendix 10.21 compatible) (All versions < V4.1.2), Mendix SAML (Mendix 9.24. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse. Rated critical severity (CVSS 9.6), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in devscripts (a collection of scripts to make the life of a Debian Package maintainer. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

samlify is a Node.js library for SAML single sign-on. Rated critical severity (CVSS 9.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

OpenPGP.js is a JavaScript implementation of the OpenPGP protocol. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A vulnerability in Cisco IOS Software for Cisco Catalyst 2960X, 2960XR, 2960CX, and 3560CX Series Switches could allow an authenticated, local attacker with privilege level 15 or an unauthenticated. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Improper verification of cryptographic signature in Microsoft Azure Functions allows an authorized attacker to execute code over a network. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. No vendor patch available.

Improper Verification of Cryptographic Signature vulnerability in LibreOffice allows PDF Signature Spoofing by Improper Validation. Rated low severity (CVSS 2.4), this vulnerability is low attack complexity. No vendor patch available.

CarlinKit CPC200-CCPA update.cgi Improper Verification of Cryptographic Signature Code Execution Vulnerability. Rated high severity (CVSS 8.0), this vulnerability is low attack complexity. No vendor patch available.

CarlinKit CPC200-CCPA Improper Verification of Cryptographic Signature Code Execution Vulnerability. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

NSSCryptoSignBackend.cc in Poppler before 25.04.0 does not verify the adbe.pkcs7.sha1 signatures on documents, resulting in potential signature forgeries. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity.

A vulnerability in the web-based management interface of Cisco Secure Network Analytics could allow an authenticated, remote attacker with valid administrative credentials to execute arbitrary. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. No vendor patch available.

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

MSI Center before 2.0.52.0 has Missing PE Signature Validation. Rated high severity (CVSS 8.1), this vulnerability is no authentication required. No vendor patch available.

MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

The OpenSAML C++ library before 3.3.1 allows forging of signed SAML messages via parameter manipulation (when using SAML bindings that rely on non-XML signatures). Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

xml-crypto is an XML digital signature and encryption library for Node.js. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

xml-crypto is an XML digital signature and encryption library for Node.js. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 13.8%.

A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker with high privileges to bypass the Secure Boot functionality and load unverified software on. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.

A vulnerability in the interprocess communication (IPC) channel of Cisco Secure Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device. Rated high severity (CVSS 7.1), this vulnerability is low attack complexity. No vendor patch available.

Vasion Print (formerly PrinterLogic) before Virtual Appliance Host 22.0.843 Application 20.0.1923 allows Insufficient Signature Validation OVE-20230524-0014. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Improper verification of the digital signature in ksojscore.dll in Kingsoft WPS Office in versions equal or less than 12.1.0.18276 on Windows allows an attacker to load an arbitrary Windows library. Rated critical severity (CVSS 9.3), this vulnerability is low attack complexity. No vendor patch available.

aes-gcm is a pure Rust implementation of the AES-GCM. Rated medium severity (CVSS 5.6), this vulnerability is no authentication required. No vendor patch available.

Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious CPU microcode resulting in loss of confidentiality and. Rated high severity (CVSS 7.2). No vendor patch available.

Hyperbridge is a hyper-scalable coprocessor for verifiable, cross-chain interoperability. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An improper verification of cryptographic signature vulnerability was identified in GitHub Enterprise Server that allowed signature spoofing for unauthorized internal users. Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable. Epss exploitation probability 11.8% and no vendor patch available.

The AWS Cloud Development Kit (AWS CDK) is an open-source software development framework to define cloud infrastructure in code and provision it through AWS CloudFormation. Rated low severity (CVSS 1.8), this vulnerability is remotely exploitable. No vendor patch available.

Improper signature verification in Ivanti EPM before the 2024 January-2025 Security Update and 2022 SU6 January-2025 Security Update allows a remote unauthenticated attacker to achieve remote code. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Howyar UEFI Application "Reloader" (32-bit and 64-bit) is vulnerable to execution of unsigned software in a hardcoded path. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available.

Hyperledger Aries Cloud Agent Python (ACA-Py) is a foundation for building decentralized identity applications and services running in non-mobile environments. Rated critical severity (CVSS 9.9), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.