CVE-2026-103001
MEDIUM
6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: high
Availability: none
Description
AI Translation Available
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.
471
Modification of Assumed-Immutable Data (MAID)
DraftCommon Consequences
Security Scopes Affected:
Integrity
Potential Impacts:
Modify Application Data
Unexpected State
Applicable Platforms
Technologies:
Not Technology-Specific, Web Based
https://github.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed…
https://github.com/jpadilla/pyjwt/issues/679
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q