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PatchSiren cyber security CVE debrief

CVE-2026-36727 bookcars CVE debrief

CVE-2026-36727 is a critical vulnerability in the /api/social-sign-in endpoint of bookcars v8.3. The vulnerability allows attackers to bypass authentication via a forged JWT token, with a CVSS score of 9.1. The vulnerability was published on [cvePublishedAt] and modified on [cveModifiedAt].

Vendor
bookcars
Product
v8.3
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-10
Advisory published
2026-06-09
Advisory updated
2026-06-10

Who should care

Users of bookcars v8.3 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by an insecure authentication mechanism in the /api/social-sign-in endpoint of bookcars v8.3. This allows attackers to bypass authentication by forging a JWT token.

Defensive priority

High

Recommended defensive actions

  • Update to a patched version of bookcars
  • Implement additional authentication mechanisms to prevent JWT token forgery

Evidence notes

The vulnerability was reported via [resourceLinkAnnotations ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-36727 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-36727

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-36727 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-36727

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.