lepture/authlib · Security
Authlib has algorithm confusion with asymmetric public keys
- GHSA ID
- GHSA-5357-c2jx-v7qh
- CVE ID
- CVE-2024-37568
- Severity
- high
- Published
- Updated
- CVSS
- 7.4 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS v3
- 7.4 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Description
lepture Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. (This is similar to CVE-2022-29217 and CVE-2024-33663.)
CWEs
- CWE-284 · Improper Access Control
- CWE-327 · Use of a Broken or Risky Cryptographic Algorithm
- CWE-347 · Improper Verification of Cryptographic Signature
References
- https://nvd.nist.gov/vuln/detail/CVE-2024-37568 ↗
- https://github.com/lepture/authlib/issues/654 ↗
- https://github.com/pypa/advisory-database/tree/main/vulns/authlib/PYSEC-2024-52.yaml ↗
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZI7HYGN7VZAYFV6UV3SRLYF7QGERXIU ↗
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FHJI32SN4FNAUVNALVGOKWHNSQ6XS3M5 ↗
- https://www.vicarius.io/vsociety/posts/algorithm-confusion-in-lepture-authlib-cve-2024-37568 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00032.html ↗
- https://github.com/advisories/GHSA-5357-c2jx-v7qh ↗