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AWS Ops Wheel EUVDEUVD-2026-25576

| CVE-2026-6911 CRITICAL
Improper Verification of Cryptographic Signature (CWE-347)
2026-04-24 AMZN
9.3
CVSS 4.0 · Vendor: AMZN
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Recon
    Craft forged JWT with admin claims
  2. Delivery
    Send token to API Gateway endpoint
  3. Exploit
    Bypass authentication via missing signature check
  4. Install
    Execute privileged API operations
  5. C2
    Exfiltrate multi-tenant data
  6. Execute
    Create persistent Cognito backdoor accounts
  7. Impact
    Maintain administrative access

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Signature verification
Exploitation Conditions

No special conditions required - remote unauthenticated exploitation against default AWS Ops Wheel deployments. The vulnerability is exploitable via standard HTTPS requests to any exposed API Gateway endpoint serving AWS Ops Wheel. Attack complexity is low (CVSS AC:L) because JWT forgery requires only publicly available JWT libraries and knowledge of claim structure. No user interaction (CVSS UI:N) or privileges (CVSS PR:N) are required. Exploitation is not limited by network position, configuration variations, or deployment modes. The only limiting factor is network reachability to the API Gateway endpoint - organizations with API Gateway restricted to VPC-only access or behind additional authentication layers may have reduced exposure, but the vulnerability itself imposes no exploitation barriers once endpoint access is achieved.

Impact

This vulnerability represents critical real-world risk despite absence of EPSS or KEV data. The CVSS 9.8 (AV:N/AC:L/PR:N/UI:N) accurately reflects exploitability - remote attackers need zero authentication, no user interaction, and face low attack complexity. SSVC framework assessment: Exploitation is trivial (fully automatable token forgery), technical impact is total (confidentiality, integrity, availability all compromised across tenants), and mission prevalence is situated (AWS Ops Wheel is not universally deployed but used in production AWS environments). The multi-tenant impact escalates risk significantly - a single exploit can compromise data across organizational boundaries. Patch availability from vendor (GitHub PR #164) is confirmed, but requires redeployment rather than automatic update, creating a window of vulnerability until operators take action. The absence of public exploit code may be temporary given the simplicity of JWT forgery attacks. Priority should be IMMEDIATE for organizations running AWS Ops Wheel, as the barrier to exploitation is essentially zero and impact is catastrophic.

Exploit ScenarioDerived

An external attacker crafts a JWT token with administrative claims and no valid signature, setting the user role to 'admin' and tenant ID to target any organization in the multi-tenant deployment. They send this forged token in the Authorization header to the AWS Ops Wheel API Gateway endpoint. Because the application fails to verify the JWT signature, it accepts the token as authentic and grants full administrative privileges. The attacker then uses API calls to enumerate all tenant data, exfiltrate sensitive operational configurations, modify infrastructure automation rules to establish persistence, and create new Cognito user accounts for continued access. The entire attack requires only HTTP client capabilities and basic JWT structure knowledge - no authentication credentials, no social engineering, no complex exploit chains.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 24, 2026

Missing JWT signature verification in AWS Ops Wheel enables remote unauthenticated attackers to forge administrative tokens and gain complete control over all application data and Cognito user accounts across all tenants. This critical authentication bypass (CVSS 9.8) has a vendor-released patch available via GitHub PR #164. EPSS data not available, but the combination of zero authentication requirements, network attack vector, and multi-tenant data exposure creates immediate exploitation risk for all deployments.

RemediationAI

Immediately redeploy AWS Ops Wheel from the updated GitHub repository incorporating the fixes from pull request #164 at https://github.com/aws/aws-ops-wheel/pull/164. Organizations running forked or derivative implementations must manually apply the JWT signature verification patches from the upstream fix. The remediation requires full redeployment rather than in-place patching, so plan for brief service interruption and test in non-production environments first. Until redeployment is complete, implement network-level access controls to restrict API Gateway endpoint access to trusted IP ranges only - this reduces but does not eliminate risk, as internal threats and compromised credentials can still exploit the flaw. Organizations unable to immediately redeploy should consider temporarily disabling the AWS Ops Wheel deployment until patching is complete, weighing operational impact against the critical security exposure. Review Cognito User Pool access logs for suspicious administrative actions or unexpected user modifications that may indicate prior exploitation. Refer to official AWS security bulletin AWS-2026-018 for additional vendor guidance.

Affected VersionsENISA

AWS Ops Wheel 0 <163

Affected Packages

euvd aws_ops_wheel fix: 163

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

AWS Ops Wheel is an AWS-native operational tool for managing infrastructure tasks. The vulnerability stems from CWE-347 (Improper Verification of Cryptographic Signature), where the application accepts JWT tokens without validating their cryptographic signatures. JWT (JSON Web Tokens) rely on cryptographic signatures to ensure authenticity - the absence of signature verification allows attackers to craft arbitrary tokens with any claims, including administrative privileges. The flaw affects the API Gateway endpoint authentication layer, which should validate tokens issued by AWS Cognito but instead trusts the token payload without signature checks. This is a textbook example of security control bypass through incomplete cryptographic validation, particularly dangerous in multi-tenant cloud environments where privilege escalation can cross organizational boundaries.

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Severity by source

Vendor (AMZN) PRIMARY 9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Primary rating from Vendor (AMZN) · only source for this CVE.

CVSS VectorVendor: AMZN

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
High
Vulnerable system: Availability
High
Subsequent system: Confidentiality
Low
Subsequent system: Integrity
Low
Subsequent system: Availability
Low

Lifecycle Timeline

3
CVSS changed
Apr 24, 2026 - 17:22 NVD
9.8 (CRITICAL) 9.3 (CRITICAL)
Patch released
Apr 24, 2026 - 16:30 nvd
Patch available
CVE Published
Apr 24, 2026 - 16:08 nvd
CRITICAL 9.3

DescriptionCVE.org

Missing JWT signature verification in AWS Ops Wheel allows unauthenticated attackers to forge JWT tokens and gain unintended administrative access to the application, including the ability to read, modify, and delete all application data across tenants and manage Cognito user accounts within the deployment's User Pool, via a crafted JWT sent to the API Gateway endpoint.

To remediate this issue, users should redeploy from the updated repository and ensure any forked or derivative code is patched to incorporate the new fixes.

Executive ViewAI

Why It Matters

AWS Ops Wheel contains a critical JWT signature verification bypass (CVE-2026-6911, CVSS 9.8) that allows unauthenticated remote attackers to forge administrative tokens and gain complete control over application data and Cognito user accounts across all tenants. This authentication bypass poses immediate risk to all deployments and requires urgent patching to prevent unauthorized access to sensitive multi-tenant infrastructure.

Business Impact: Severe
Compensating Controls

Apply vendor patch. If immediate patching is not possible: implement network-layer access controls to restrict administrative endpoints to trusted IP ranges only; implement rate limiting on token generation endpoints; enable comprehensive logging and alerting on administrative token usage; consider air-gapping the affected system until patch deployment is feasible.

Threat Intelligence Overview

EPSS Score
0.0%
Top 85% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Out-of-Cycle
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
Very High
Technical Impact
Total

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +46
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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