suse-su-2025:3754-1
Vulnerability from csaf_suse
Published
2025-10-23 10:27
Modified
2025-10-23 10:27
Summary
Security update for python-Authlib

Notes

Title of the patch
Security update for python-Authlib
Description of the patch
This update for python-Authlib fixes the following issues: - CVE-2025-61920: limited the size of the header to prevent DoS (bsc#1251921).
Patchnames
SUSE-2025-3754,SUSE-SLE-Module-Python3-15-SP6-2025-3754,SUSE-SLE-Module-Python3-15-SP7-2025-3754,openSUSE-SLE-15.6-2025-3754
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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        "title": "Patchnames"
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          "category": "general",
          "text": "Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib\u0027s 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.",
          "title": "CVE description"
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          "cvss_v3": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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    }
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}


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