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CVE-2026-103001 Details

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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CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed35	[email protected]
https://github.com/jpadilla/pyjwt/issues/679	[email protected]
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-471	Modification of Assumed-Immutable Data (MAID)	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

1 change record found show changes