CVE-2026-36721
CRITICALCVSS 9.8/10EPSS 0.27%
Last modified
CVE-2026-36721 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A lack of cryptographic signature verification in the validateAccessToken function of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-36721?
A lack of cryptographic signature verification in the validateAccessToken function of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token.
How severe is CVE-2026-36721?
CVE-2026-36721 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.
How do I fix CVE-2026-36721?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-3669A security vulnerability has been detected in Freedom Factor…5.3
- CVE-2026-3670A vulnerability was detected in Freedom Factory dGEN1 up to …5.3
- CVE-2026-3671A flaw has been found in Freedom Factory dGEN1 up to 2026022…3.3
- CVE-2026-36719An information disclosure vulnerability in the /api/v1/user/…7.5
- CVE-2026-3672A vulnerability has been found in JeecgBoot up to 3.9.1. Aff…6.3
- CVE-2026-36720Insecure permissions in bookcars v8.3 allows authenticated a…8.1
- CVE-2026-36722An authenticated arbitrary file upload vulnerability in the …5.4
- CVE-2026-36723An unrestricted file rename vulnerability in the /api/create…8.8
- CVE-2026-36724An uncaught exception in the /application/job/update/{id} en…6.5
- CVE-2026-36725A markdown based cross-site scripting (XSS) vulnerability in…6.1
- CVE-2026-36726An arbitrary file deletion vulnerability in the /api/delete-…5.3
- CVE-2026-36727An insecure authentication vulnerability in the /api/social-…9.1
Are you affected by CVE-2026-36721?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST