python311-Authlib-1.6.5-1.1 on GA media SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2025:16691 Final 1 1 2025-10-13T00:00:00Z current 2025-10-13T00:00:00Z 2025-10-13T00:00:00Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z python311-Authlib-1.6.5-1.1 on GA media These are all security issues fixed in the python311-Authlib-1.6.5-1.1 package on the GA media of openSUSE Tumbleweed. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). openSUSE-Tumbleweed-2025-16691 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/security/rating/ SUSE Security Ratings https://www.suse.com/security/cve/CVE-2025-61920/ SUSE CVE CVE-2025-61920 page openSUSE Tumbleweed python311-Authlib-1.6.5-1.1 python312-Authlib-1.6.5-1.1 python313-Authlib-1.6.5-1.1 python311-Authlib-1.6.5-1.1 as a component of openSUSE Tumbleweed python312-Authlib-1.6.5-1.1 as a component of openSUSE Tumbleweed python313-Authlib-1.6.5-1.1 as a component of openSUSE Tumbleweed Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib's JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url-encoded header or signature spans hundreds of megabytes. During verification, Authlib decodes and parses the full input before it is rejected, driving CPU and memory consumption to hostile levels and enabling denial of service. Version 1.6.5 patches the issue. Some temporary workarounds are available. Enforce input size limits before handing tokens to Authlib and/or use application-level throttling to reduce amplification risk. CVE-2025-61920 openSUSE Tumbleweed:python311-Authlib-1.6.5-1.1 openSUSE Tumbleweed:python312-Authlib-1.6.5-1.1 openSUSE Tumbleweed:python313-Authlib-1.6.5-1.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/security/cve/CVE-2025-61920.html CVE-2025-61920 https://bugzilla.suse.com/1251921 SUSE Bug 1251921