ESB-2026.3134 — Vulnetix

ESB-2026.3134 PUBLISHED CVSS 7.5 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3134 Security update for python-PyJWT 31 March 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: python-PyJWT Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-32597 CVE-2024-53861 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-202620879-1 Comment: CVSS (Max): 7.5 CVE-2026-32597 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) CVSS Source: GitHub, [SUSE] Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N EPSS (Max): 1.0% (77th) CVE-2024-53861 2026-03-30 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for python-PyJWT Announcement ID: SUSE-SU-2026:20879-1 Release Date: 2026-03-26T08:57:18Z Rating: important o bsc#1234038 References: o bsc#1259616 o CVE-2024-53861 Cross-References: o CVE-2026-32597 o 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 o 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 o CVE-2026-32597 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N CVSS scores: /UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N o 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 o 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 o SUSE Linux Micro 6.1 Products: 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: o CVE-2024-53861: prevent partial matching of the Issuer field (bsc#1234038). o CVE-2026-32597: validate the crit Header Parameter defined in RFC 7515 (bsc #1259616). Changelog: Update to 2.12.1: o Add missing typing_extensions dependency for Python < 3.11 in #1150 Update to 2.12.0: o Annotate PyJWKSet.keys for pyright by @tamird in #1134 o Close HTTPError response to prevent ResourceWarning on Python 3.14 by @veeceey in #1133 o Do not keep algorithms dict in PyJWK instances by @akx in #1143 o Use PyJWK algorithm when encoding without explicit algorithm in #1148 o 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: o Enforce ECDSA curve validation per RFC 7518 Section 3.4. o Fix build system warnings by @kurtmckee in #1105 o Validate key against allowed types for Algorithm family in #964 o Add iterator for JWKSet in #1041 o Validate iss claim is a string during encoding and decoding by @pachewise in #1040 o Improve typing/logic for options in decode, decode_complete by @pachewise in #1045 o Declare float supported type for lifespan and timeout by @nikitagashkov in #1068 o Fix SyntaxWarnings/DeprecationWarnings caused by invalid escape sequences by @kurtmckee in #1103 o Development: Build a shared wheel once to speed up test suite setup times by @kurtmckee in #1114 o 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 o Support Python 3.14, and test against PyPy 3.10 and 3.11 by @kurtmckee in # 1104 o Development: Migrate to build to test package building in CI by @kurtmckee in #1108 o Development: Improve coverage config and eliminate unused test suite code by @kurtmckee in #1115 o Docs: Standardize CHANGELOG links to PRs by @kurtmckee in #1110 o Docs: Fix Read the Docs builds by @kurtmckee in #1111 o Docs: Add example of using leeway with nbf by @djw8605 in #1034 o Docs: Refactored docs with autodoc; added PyJWS and jwt.algorithms docs by @pachewise in #1045 o Docs: Documentation improvements for "sub" and "jti" claims by @cleder in # 1088 o Development: Add pyupgrade as a pre-commit hook by @kurtmckee in #1109 o 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. o Refactor PyJWT to own an internal PyJWS instance instead of calling global api_jws functions. Update to 2.10.0: o chore: use sequence for typing rather than list o Add support for Python 3.13 o [pre-commit.ci] pre-commit autoupdate o Add an RTD config file to resolve RTD build failures o docs: Update iat exception docs o Remove algorithm requirement for JWT API o Create SECURITY.md o docs fix: decode_complete scope and algorithms o fix doctest for docs/usage.rst o fix test_utils.py not to xfail o Correct jwt.decode audience param doc expression o Add PS256 encoding and decoding usage o Add API docs for PyJWK o Refactor project configuration files from setup.cfg to pyproject.toml PEP-518 o Add JWK support to JWT encode o Update pre-commit hooks to lint pyproject.toml o Add EdDSA algorithm encoding/decoding usage o Ruff linter and formatter changes o Validate sub and jti claims for the token o Add ES256 usage o Encode EC keys with a fixed bit length o Drop support for Python 3.8 o Prepare 2.10.0 release o 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: o SUSE Linux Micro 6.1 zypper in -t patch SUSE-SLE-Micro-6.1-463=1 Package List: o SUSE Linux Micro 6.1 (noarch) python311-PyJWT-2.12.1-slfo.1.1_1.1 References: o https://www.suse.com/security/cve/CVE-2024-53861.html o https://www.suse.com/security/cve/CVE-2026-32597.html o https://bugzilla.suse.com/show_bug.cgi?id=1234038 o https://bugzilla.suse.com/show_bug.cgi?id=1259616 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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Risk Scores

CVSS v3.1

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Products

Vendor	Product	Versions
SUSE	python-PyJWT

Timeline

Mar 30, 2026 CVE Published

References

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