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CWE-303

Incorrect Implementation of Authentication Algorithm

27 CVEs Avg CVSS 7.5 MITRE
8
CRITICAL
7
HIGH
12
MEDIUM
0
LOW
8
POC
0
KEV

Monthly

CVE-2026-8922 MEDIUM This Month

Token revocation bypass in Red Hat Keycloak's OIDC Introspection endpoint allows low-privileged authenticated users to continue using tokens that should have been invalidated by realm-level notBefore revocation policies. When both realm-level and client-level notBefore policies are simultaneously active, the introspection endpoint incorrectly evaluates only the client-level policy, silently ignoring the realm-wide revocation. This means an administrator's deliberate, broad-scope revocation action - typically used in incident response or forced re-authentication scenarios - is rendered ineffective for any clients that also carry a client-level notBefore setting. No public exploit has been identified at time of analysis, and the issue is not listed in the CISA KEV catalog.

Authentication Bypass Red Hat
NVD
CVSS 3.1
5.4
EPSS
0.0%
CVE-2026-41103 CRITICAL PATCH NEWS Act Now

Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.

Authentication Bypass Microsoft Atlassian
NVD VulDB
CVSS 3.1
9.1
EPSS
0.1%
CVE-2026-43640 HIGH POC PATCH This Week

Authentication bypass in Bitwarden Server versions prior to 2026.4.1 allows authenticated users with SCIM management privileges to retrieve or rotate organization SCIM API keys without master password re-authentication. An attacker with valid session credentials and SCIM management rights can obtain sensitive API keys that enable user provisioning control, potentially leading to unauthorized account creation, modification, or deletion within the organization. Public exploit code exists, and vendor patch v2026.4.1 addresses the issue via GitHub PR #7403.

Information Disclosure
NVD GitHub
CVSS 4.0
8.6
EPSS
0.1%
CVE-2026-0073 HIGH POC This Week

Authentication bypass in Android Debug Bridge (ADB) wireless mutual authentication allows adjacent network attackers to execute arbitrary code as the shell user without authentication. The flaw affects Android 14, 15, and 16 series, residing in the TLS certificate verification logic of adbd_tls_verify_cert. EPSS data not available, but CISA SSVC framework indicates no current exploitation evidence and non-automatable attack requiring network adjacency. CVSS 8.8 reflects high impact across confidentiality, integrity, and availability when the wireless debugging feature is enabled.

RCE
NVD GitHub
CVSS 3.1
8.8
EPSS
0.0%
CVE-2026-27656 Go MEDIUM PATCH This Month

Mattermost fails to properly validate user identity in OpenID Connect authentication logic due to an overly permissive substring matching flaw in the IsSameUser() comparison function, allowing attackers with high privileges to take over arbitrary user accounts through the user discovery flow. This affects Mattermost versions 10.11.0-10.11.11, 11.2.0-11.2.3, 11.3.0-11.3.1, and 11.4.0. While the CVSS score of 5.7 is moderate and requires high privilege access and user interaction, the core impact is account takeover with full account compromise possible.

Information Disclosure
NVD VulDB
CVSS 3.1
5.7
EPSS
0.0%
CVE-2026-32953 Go MEDIUM PATCH This Month

CVE-2026-32953 is a security vulnerability. Remediation should follow standard vulnerability management procedures. Vendor patch is available.

RCE Suse
NVD GitHub VulDB
CVSS 4.0
4.7
EPSS
0.0%
CVE-2026-29515 CRITICAL Act Now

embedded SwiFTP FTP server component contains a vulnerability that allows attackers to log in without valid credentials.

Authentication Bypass
NVD GitHub
CVSS 4.0
9.3
EPSS
0.1%
CVE-2026-28446 npm CRITICAL POC PATCH Act Now

Auth bypass in OpenClaw voice-call extension before 2026.2.1. EPSS 0.68%. PoC and patch available.

Authentication Bypass AI / ML Openclaw
NVD GitHub
CVSS 3.1
9.4
EPSS
0.7%
CVE-2019-25436 MEDIUM POC This Month

Deviceviewer versions up to 3.12.0.1 contains a vulnerability that allows attackers to change passwords without proper validation of the old password field (CVSS 6.5).

Authentication Bypass Deviceviewer
NVD Exploit-DB
CVSS 3.1
6.5
EPSS
0.0%
CVE-2026-0999 Go MEDIUM PATCH This Month

Mattermost Server versions 11.1.x through 11.1.2, 10.11.x through 10.11.9, and 11.2.x through 11.2.1 inadequately enforce login method restrictions, permitting authenticated users to circumvent SSO-only requirements by authenticating with a userID instead. This allows an attacker with valid credentials to gain unauthorized access to accounts restricted to single sign-on authentication. No patch is currently available for this vulnerability.

Authentication Bypass Mattermost Server Suse
NVD
CVSS 3.1
5.4
EPSS
0.0%
EPSS 0% CVSS 5.4
MEDIUM This Month

Token revocation bypass in Red Hat Keycloak's OIDC Introspection endpoint allows low-privileged authenticated users to continue using tokens that should have been invalidated by realm-level notBefore revocation policies. When both realm-level and client-level notBefore policies are simultaneously active, the introspection endpoint incorrectly evaluates only the client-level policy, silently ignoring the realm-wide revocation. This means an administrator's deliberate, broad-scope revocation action - typically used in incident response or forced re-authentication scenarios - is rendered ineffective for any clients that also carry a client-level notBefore setting. No public exploit has been identified at time of analysis, and the issue is not listed in the CISA KEV catalog.

Authentication Bypass Red Hat
NVD
EPSS 0% CVSS 9.1
CRITICAL PATCH Act Now

Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.

Authentication Bypass Microsoft Atlassian
NVD VulDB
EPSS 0% CVSS 8.6
HIGH POC PATCH This Week

Authentication bypass in Bitwarden Server versions prior to 2026.4.1 allows authenticated users with SCIM management privileges to retrieve or rotate organization SCIM API keys without master password re-authentication. An attacker with valid session credentials and SCIM management rights can obtain sensitive API keys that enable user provisioning control, potentially leading to unauthorized account creation, modification, or deletion within the organization. Public exploit code exists, and vendor patch v2026.4.1 addresses the issue via GitHub PR #7403.

Information Disclosure
NVD GitHub
EPSS 0% CVSS 8.8
HIGH POC This Week

Authentication bypass in Android Debug Bridge (ADB) wireless mutual authentication allows adjacent network attackers to execute arbitrary code as the shell user without authentication. The flaw affects Android 14, 15, and 16 series, residing in the TLS certificate verification logic of adbd_tls_verify_cert. EPSS data not available, but CISA SSVC framework indicates no current exploitation evidence and non-automatable attack requiring network adjacency. CVSS 8.8 reflects high impact across confidentiality, integrity, and availability when the wireless debugging feature is enabled.

RCE
NVD GitHub
EPSS 0% CVSS 5.7
MEDIUM PATCH This Month

Mattermost fails to properly validate user identity in OpenID Connect authentication logic due to an overly permissive substring matching flaw in the IsSameUser() comparison function, allowing attackers with high privileges to take over arbitrary user accounts through the user discovery flow. This affects Mattermost versions 10.11.0-10.11.11, 11.2.0-11.2.3, 11.3.0-11.3.1, and 11.4.0. While the CVSS score of 5.7 is moderate and requires high privilege access and user interaction, the core impact is account takeover with full account compromise possible.

Information Disclosure
NVD VulDB
EPSS 0% CVSS 4.7
MEDIUM PATCH This Month

CVE-2026-32953 is a security vulnerability. Remediation should follow standard vulnerability management procedures. Vendor patch is available.

RCE Suse
NVD GitHub VulDB
EPSS 0% CVSS 9.3
CRITICAL Act Now

embedded SwiFTP FTP server component contains a vulnerability that allows attackers to log in without valid credentials.

Authentication Bypass
NVD GitHub
EPSS 1% CVSS 9.4
CRITICAL POC PATCH Act Now

Auth bypass in OpenClaw voice-call extension before 2026.2.1. EPSS 0.68%. PoC and patch available.

Authentication Bypass AI / ML Openclaw
NVD GitHub
EPSS 0% CVSS 6.5
MEDIUM POC This Month

Deviceviewer versions up to 3.12.0.1 contains a vulnerability that allows attackers to change passwords without proper validation of the old password field (CVSS 6.5).

Authentication Bypass Deviceviewer
NVD Exploit-DB
EPSS 0% CVSS 5.4
MEDIUM PATCH This Month

Mattermost Server versions 11.1.x through 11.1.2, 10.11.x through 10.11.9, and 11.2.x through 11.2.1 inadequately enforce login method restrictions, permitting authenticated users to circumvent SSO-only requirements by authenticating with a userID instead. This allows an attacker with valid credentials to gain unauthorized access to accounts restricted to single sign-on authentication. No patch is currently available for this vulnerability.

Authentication Bypass Mattermost Server Suse
NVD

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