SUSE-SU-2026:20879-1: important: Security update for python-PyJWT

Mon Mar 30 12:34:29 UTC 2026

# Security update for python-PyJWT

Announcement ID: SUSE-SU-2026:20879-1  
Release Date: 2026-03-26T08:57:18Z  
Rating: important  
References:

  * bsc#1234038
  * bsc#1259616

Cross-References:

  * CVE-2024-53861
  * CVE-2026-32597

CVSS scores:

  * CVE-2024-53861 ( NVD ):  2.2 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
  * CVE-2024-53861 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-32597 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-32597 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  * CVE-2026-32597 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Products:

  * SUSE Linux Micro 6.1

An update that solves two vulnerabilities can now be installed.

## Description:

This update for python-PyJWT fixes the following issues:

Update to PyJWT 2.12.1:

  * CVE-2024-53861: prevent partial matching of the Issuer field (bsc#1234038).
  * CVE-2026-32597: validate the crit Header Parameter defined in RFC 7515
    (bsc#1259616).

Changelog:

Update to 2.12.1:

  * Add missing typing_extensions dependency for Python < 3.11 in #1150

Update to 2.12.0:

  * Annotate PyJWKSet.keys for pyright by @tamird in #1134
  * Close HTTPError response to prevent ResourceWarning on Python 3.14 by
    @veeceey in #1133
  * Do not keep algorithms dict in PyJWK instances by @akx in #1143
  * Use PyJWK algorithm when encoding without explicit algorithm in #1148
  * Docs: Add PyJWKClient API reference and document the two-tier caching system
    (JWK Set cache and signing key LRU cache).

Update to 2.11.0:

  * Enforce ECDSA curve validation per RFC 7518 Section 3.4.
  * Fix build system warnings by @kurtmckee in #1105
  * Validate key against allowed types for Algorithm family in #964
  * Add iterator for JWKSet in #1041
  * Validate iss claim is a string during encoding and decoding by @pachewise in
    #1040
  * Improve typing/logic for options in decode, decode_complete by @pachewise in
    #1045
  * Declare float supported type for lifespan and timeout by @nikitagashkov in
    #1068
  * Fix SyntaxWarnings/DeprecationWarnings caused by invalid escape sequences by
    @kurtmckee in #1103
  * Development: Build a shared wheel once to speed up test suite setup times by
    @kurtmckee in #1114
  * Development: Test type annotations across all supported Python versions,
    increase the strictness of the type checking, and remove the mypy pre-commit
    hook by @kurtmckee in #1112
  * Support Python 3.14, and test against PyPy 3.10 and 3.11 by @kurtmckee in
    #1104
  * Development: Migrate to build to test package building in CI by @kurtmckee
    in #1108
  * Development: Improve coverage config and eliminate unused test suite code by
    @kurtmckee in #1115
  * Docs: Standardize CHANGELOG links to PRs by @kurtmckee in #1110
  * Docs: Fix Read the Docs builds by @kurtmckee in #1111
  * Docs: Add example of using leeway with nbf by @djw8605 in #1034
  * Docs: Refactored docs with autodoc; added PyJWS and jwt.algorithms docs by
    @pachewise in #1045
  * Docs: Documentation improvements for "sub" and "jti" claims by @cleder in
    #1088
  * Development: Add pyupgrade as a pre-commit hook by @kurtmckee in #1109
  * Add minimum key length validation for HMAC and RSA keys (CWE-326). Warns by
    default via InsecureKeyLengthWarning when keys are below minimum recommended
    lengths per RFC 7518 Section 3.2 (HMAC) and NIST SP 800-131A (RSA). Pass
    enforce_minimum_key_length=True in options to PyJWT or PyJWS to raise
    InvalidKeyError instead.
  * Refactor PyJWT to own an internal PyJWS instance instead of calling global
    api_jws functions.

Update to 2.10.0:

  * chore: use sequence for typing rather than list
  * Add support for Python 3.13
  * [pre-commit.ci] pre-commit autoupdate
  * Add an RTD config file to resolve RTD build failures
  * docs: Update iat exception docs
  * Remove algorithm requirement for JWT API
  * Create SECURITY.md
  * docs fix: decode_complete scope and algorithms
  * fix doctest for docs/usage.rst
  * fix test_utils.py not to xfail
  * Correct jwt.decode audience param doc expression
  * Add PS256 encoding and decoding usage
  * Add API docs for PyJWK
  * Refactor project configuration files from setup.cfg to pyproject.toml
    PEP-518
  * Add JWK support to JWT encode
  * Update pre-commit hooks to lint pyproject.toml
  * Add EdDSA algorithm encoding/decoding usage
  * Ruff linter and formatter changes
  * Validate sub and jti claims for the token
  * Add ES256 usage
  * Encode EC keys with a fixed bit length
  * Drop support for Python 3.8
  * Prepare 2.10.0 release
  * Bump codecov/codecov-action from 4 to 5

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Micro 6.1  
    zypper in -t patch SUSE-SLE-Micro-6.1-463=1

## Package List:

  * SUSE Linux Micro 6.1 (noarch)
    * python311-PyJWT-2.12.1-slfo.1.1_1.1

## References:

  * https://www.suse.com/security/cve/CVE-2024-53861.html
  * https://www.suse.com/security/cve/CVE-2026-32597.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1234038
  * https://bugzilla.suse.com/show_bug.cgi?id=1259616

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