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CVE-2026-102274

CVE-2026-102274 · PyJWT: Malformed RSA JWK aborts parsing of an entire JWK Set

This page contains facts from public vulnerability sources. Check the original advisory before updating.

PyJWT is a Python implementation of JSON Web Token standards. From 2.9.0 until 2.14.0, PyJWKSet does not catch the plain ValueError raised for malformed RSA JWK components by RSAAlgorithm.from_jwk in jwt/api_jwk.py. This occurs when a JWK Set contains a malformed RSA key alongside otherwise usable keys. As a result, one malformed member aborts construction of the entire PyJWKSet. Consequently, applications can experience authentication failures or request-level denial of service. This issue is fixed in version 2.14.0.

CVSS 5.9 · Medium · EPSS 0.4% · Public exploit · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • pyjwt

    Versions
    • >= 2.9.0, < 2.14.0: Affected

    No fix published

  • pyjwt Debian:12

    Versions
    • 2.10.1-1
    • 2.10.1-2
    • 2.10.1-3
    • 2.10.1-4
    • 2.11.0-2
    • 2.12.1-1
    • 2.13.0-1
    • 2.14.0-1
    • 2.15.0-1
    • 2.15.1-1
    • 2.6.0-1
    • 2.6.0-1+deb12u1
    • 2.7.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pyjwt Debian:13

    Versions
    • 2.10.1-2
    • 2.10.1-2+deb13u1
    • 2.10.1-3
    • 2.10.1-4
    • 2.11.0-2
    • 2.12.1-1
    • 2.13.0-1
    • 2.14.0-1
    • 2.15.0-1
    • 2.15.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pyjwt Debian:14

    Versions
    • 2.10.1-2
    • 2.10.1-3
    • 2.10.1-4
    • 2.11.0-2
    • 2.12.1-1
    • 2.13.0-1
    Affected ranges
    • ECOSYSTEM: < 2.14.0-1

    Update to 2.14.0-1

  • pyjwt PyPI

    Versions
    • 2.10.0
    • 2.10.1
    • 2.11.0
    • 2.12.0
    • 2.12.1
    • 2.13.0
    • 2.9.0
    Affected ranges
    • ECOSYSTEM: ≥ 2.9.0, < 2.14.0

    Update to 2.14.0

  • pyjwt Ubuntu:22.04:LTS

    Versions
    • 1.7.1-2ubuntu2
    • 2.1.0-1
    • 2.3.0-1
    • 2.3.0-1ubuntu0.1
    • 2.3.0-1ubuntu0.2
    • 2.3.0-1ubuntu0.3
    • 2.3.0-1ubuntu0.4
    • 2.3.0-1ubuntu0.5
    • 2.3.0-1ubuntu0.6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pyjwt Ubuntu:24.04:LTS

    Versions
    • 2.7.0-1
    • 2.7.0-1ubuntu0.1
    • 2.7.0-1ubuntu0.2
    • 2.7.0-1ubuntu0.3
    • 2.7.0-1ubuntu0.4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pyjwt Ubuntu:26.10

    Versions
    • 2.10.1-4ubuntu1
    • 2.12.1-1
    • 2.13.0-1
    • 2.13.0-1ubuntu1
    • 2.13.0-1ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pyjwt Ubuntu:26.04:LTS

    Versions
    • 2.10.1-2
    • 2.10.1-3
    • 2.10.1-3build1
    • 2.10.1-4
    • 2.10.1-4ubuntu1
    • 2.10.1-4ubuntu1.1
    • 2.10.1-4ubuntu1.2
    • 2.10.1-4ubuntu1.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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