CVE-2026-36721

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A lack of cryptographic signature verification in the validateAccessToken function of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token."}, {"lang": "es", "value": "Una falta de verificaci\u00f3n de firma criptogr\u00e1fica en la funci\u00f3n validateAccessToken de bookcars v8.3 permite a los atacantes eludir la autenticaci\u00f3n a trav\u00e9s de un token JWT falsificado."}], "id": "CVE-2026-36721", "lastModified": "2026-07-23T09:10:00.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-36721", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T13:54:42.829690Z", "version": "2.0.3"}}]}, "published": "2026-06-09T19:17:42.500", "references": [{"source": "cve@mitre.org", "url": "https://github.com/CC-T-454455/Vulnerabilities/tree/master/bookcars/vulnerability-2"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/CC-T-454455/Vulnerabilities/tree/master/bookcars/vulnerability-2"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "8.3"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "bookcars", "vendor": "bookcars"}], "created": "2026-06-09T21:00:08.097810+00:00", "title": "Lack of JWT Signature Verification Enables Authentication Bypass in Bookcars 8.3", "updated": "2026-06-10T17:30:36.306415+00:00", "vendors": ["bookcars", "bookcars$PRODUCT$bookcars"]}