CVE-2024-37568
HIGH7.4EPSS 0.14%Authlib has algorithm confusion with asymmetric public keys
Published: 6/9/2024Modified: 11/3/2025
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.)
Affected packages (4)
- Debian/python-authlibfrom 0, < 0.15.4-1+deb11u1
- Debian/python-authlibfrom 0, < 0.15.4-1+deb11u1
- PyPI/authlibfrom 0, < 1.3.1
- PyPI/authlibfrom 0, < 1.3.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
References (9)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-37568
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-37568
- PATCHhttps://github.com/lepture/authlib
- WEBhttps://github.com/lepture/authlib/issues/654
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/authlib/PYSEC-2024-52.yaml
- WEBhttps://lists.debian.org/debian-lts-announce/2025/10/msg00032.html
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FHJI32SN4FNAUVNALVGOKWHNSQ6XS3M5
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZI7HYGN7VZAYFV6UV3SRLYF7QGERXIU
- WEBhttps://www.vicarius.io/vsociety/posts/algorithm-confusion-in-lepture-authlib-cve-2024-37568