Modification of Assumed-Immutable Data (MAID) Affecting py3.10-pyjwt package, versions <2.14.0-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.24% (14th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-MINIMOSLATEST-PY310PYJWT-20374301
  • published2 Oct 2026
  • disclosed30 Sept 2026

Introduced: 30 Sep 2026

NewCVE-2026-103001  (opens in a new tab)
CWE-471  (opens in a new tab)

How to fix?

Upgrade Minimos:latest py3.10-pyjwt to version 2.14.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3.10-pyjwt package and not the py3.10-pyjwt package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1