CVE-2026-36721: n/a
A lack of cryptographic signature verification in the validateAccessToken function of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token.
AI Analysis
Technical Summary
The validateAccessToken function in bookcars v8.3 does not verify the cryptographic signature of JSON Web Tokens (JWTs). This omission enables attackers to create forged JWT tokens that bypass authentication controls, potentially granting unauthorized access. The vulnerability is identified as CVE-2026-36721 and was published on June 9, 2026. There is no CVSS score or vendor advisory available, and no patch or remediation level has been disclosed. The affected versions are not explicitly stated beyond version 8.3 being referenced in the description.
Potential Impact
Attackers can bypass authentication mechanisms by presenting forged JWT tokens, potentially gaining unauthorized access to the application or sensitive resources. This undermines the integrity of the authentication process and could lead to unauthorized actions within the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider implementing additional controls such as validating JWT signatures externally or restricting access to trusted environments. Monitor for vendor updates regarding patches or official mitigations.
CVE-2026-36721: n/a
Description
A lack of cryptographic signature verification in the validateAccessToken function of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token.
CVSS v3.1
Score 9.8critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The validateAccessToken function in bookcars v8.3 does not verify the cryptographic signature of JSON Web Tokens (JWTs). This omission enables attackers to create forged JWT tokens that bypass authentication controls, potentially granting unauthorized access. The vulnerability is identified as CVE-2026-36721 and was published on June 9, 2026. There is no CVSS score or vendor advisory available, and no patch or remediation level has been disclosed. The affected versions are not explicitly stated beyond version 8.3 being referenced in the description.
Potential Impact
Attackers can bypass authentication mechanisms by presenting forged JWT tokens, potentially gaining unauthorized access to the application or sensitive resources. This undermines the integrity of the authentication process and could lead to unauthorized actions within the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider implementing additional controls such as validating JWT signatures externally or restricting access to trusted environments. Monitor for vendor updates regarding patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-04-06T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2923fb8dd33fbd851290fd
Added to database: 6/10/2026, 8:44:43 AM
Last enriched: 6/10/2026, 8:52:26 AM
Last updated: 6/10/2026, 2:58:07 PM
Views: 4
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