Security update for python-Authlib SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:3842-1 Final 1 1 2025-10-28T16:39:39Z current 2025-10-28T16:39:39Z 2025-10-28T16:39:39Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for python-Authlib This update for python-Authlib fixes the following issues: - CVE-2025-62706: fixed a denial of service condition (bsc#1252504, gh#authlib/authlib@e0863d512931) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2025-3842,SUSE-SLE-Module-Python3-15-SP6-2025-3842,SUSE-SLE-Module-Python3-15-SP7-2025-3842,openSUSE-SLE-15.6-2025-3842 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-20253842-1/ Link for SUSE-SU-2025:3842-1 https://lists.suse.com/pipermail/sle-security-updates/2025-October/023078.html E-Mail link for SUSE-SU-2025:3842-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1252504 SUSE Bug 1252504 https://www.suse.com/security/cve/CVE-2025-62706/ SUSE CVE CVE-2025-62706 page SUSE Linux Enterprise Module for Python 3 15 SP6 SUSE Linux Enterprise Module for Python 3 15 SP7 openSUSE Leap 15.6 python311-Authlib-1.3.1-150600.3.9.1 python311-Authlib-1.3.1-150600.3.9.1 as a component of SUSE Linux Enterprise Module for Python 3 15 SP6 python311-Authlib-1.3.1-150600.3.9.1 as a component of SUSE Linux Enterprise Module for Python 3 15 SP7 python311-Authlib-1.3.1-150600.3.9.1 as a component of openSUSE Leap 15.6 Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib's JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to exhaust memory and CPU and cause denial of service. This issue has been patched in version 1.6.5. Workarounds for this issue involve rejecting or stripping zip=DEF for inbound JWEs at the application boundary, forking and add a bounded decompression guard via decompressobj().decompress(data, MAX_SIZE)) and returning an error when output exceeds a safe limit, or enforcing strict maximum token sizes and fail fast on oversized inputs; combine with rate limiting. CVE-2025-62706 SUSE Linux Enterprise Module for Python 3 15 SP6:python311-Authlib-1.3.1-150600.3.9.1 SUSE Linux Enterprise Module for Python 3 15 SP7:python311-Authlib-1.3.1-150600.3.9.1 openSUSE Leap 15.6:python311-Authlib-1.3.1-150600.3.9.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20253842-1/ https://www.suse.com/security/cve/CVE-2025-62706.html CVE-2025-62706 https://bugzilla.suse.com/1252504 SUSE Bug 1252504