What is CVE-2026-31852?

CVE-2026-31852 is a critical-severity vulnerability in Jellyfin Code-quality.yml, classified under Improper Privilege Management. CVSS score: 10.0/10. Published 2026-03-11.

How severe is CVE-2026-31852?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Privilege escalation in Jellyfin Code-quality.yml

CVE-2026-31852

Jellyfin is an open-source media system. The code-quality.yml GitHub Actions workflow in jellyfin/jellyfin-ios is vulnerable to arbitrary code execution via pull requests from forked repositories. Due to the workflow's elevated permissions…

Vulnerability class: Privilege Escalation

EPSS: 0.001 (31.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Jellyfin Code-quality.yml — versions < 109217e75f38394b2f6e46e25dfe5a721203d3c8

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

https://github.com/jellyfin/jellyfin-ios/security/advisories/GHSA-7qhm-2m45-7fmh (x_refsource_CONFIRM)
https://github.com/jellyfin/jellyfin-ios/commit/109217e75f38394b2f6e46e25dfe5a721203d3c8 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-31852?: CVE-2026-31852 is a critical-severity vulnerability in Jellyfin Code-quality.yml, classified under Improper Privilege Management. CVSS score: 10.0/10. Published 2026-03-11.
How severe is CVE-2026-31852?: Critical severity. CVSS v3 base score is 10.0 out of 10.