Modification of Assumed-Immutable Data (MAID) Affecting superset-fips-6.1 package, versions <6.1.0-r7


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.24% (14th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-SUPERSETFIPS61-20411589
  • published3 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 Chainguard superset-fips-6.1 to version 6.1.0-r7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream superset-fips-6.1 package and not the superset-fips-6.1 package as distributed by Chainguard. See How to fix? for Chainguard 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