Vulnerability · Published Apr 24, 2026 · Assigned by GitHub_M
CVE-2026-41425Authlib: Cross-site request forging when using cache
Medium 5.4
In plain English
A medium-severity cross-site request forgery in authlib from authlib. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.1%top 98.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.11, there is no CSRF protection on the cache feature in authlib.integrations.starlette_client.OAuth. This vulnerability is fixed in 1.6.11.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | python-authlib | 1.2.0-1+deb12u2 | DEBIAN-CVE-2026-41425 |
| Debian:13 | python-authlib | no fix listed | DEBIAN-CVE-2026-41425 |
| Debian:14 | python-authlib | 1.7.0-1 | DEBIAN-CVE-2026-41425 |
| PyPI | authlib | 1.6.11 | PYSEC-2026-25 |
| PyPI | authlib | 1.6.11 | GHSA-jj8c-mmj3-mmgv |
| Ubuntu:25.10 | python-authlib | no fix listed | UBUNTU-CVE-2026-41425 |
| Ubuntu:26.10 | python-authlib | no fix listed | UBUNTU-CVE-2026-41425 |
Affected products (as reported)
Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
References
- https://github.com/authlib/authlib/security/advisories/GHSA-jj8c-mmj3-mmgv x_refsource_CONFIRM