CVE-2026-103001

Description

PyJWT is a Python implementation of JSON Web Token standards. From 2.11.0 through 2.13.0, PyJWT's PyJWT._merge_options() method can modify a caller-supplied mutable options mapping when verify_signature is false. If an application reuses that same mapping for a later decode() or decode_complete() call and changes verify_signature to true, the mapping can retain false values for expiration, not-before, issued-at, audience, issuer, subject, and JWT ID checks. A signed token with invalid registered claims can then be accepted without disabling signature verification, but applications that create a fresh options mapping for each call are not affected.

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Produits concernés

• jpadilla pyjwt
• Pyjwt project pyjwt

Scores CVSS

Faiblesses (CWE)

• CWE-471

Références

• https://github.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed35 Patch
• https://github.com/jpadilla/pyjwt/issues/679 ExploitIssue Tracking
• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q ExploitMitigationVendor Advisory
• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q ExploitMitigationVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories