Vulnerability Report

CVE-2026-31852

Title: Jellyfin iOS GitHub Actions Workflow RCE

Auth Bypass

Proof Of Concept

PoC Available for CVE-2026-31852

CWE Category CWE-269
Published Date Mar 11, 2026
Modified Date Mar 20, 2026
Exploit Status Available
Score 10.0 CVSS v3.1
Exploit Probability (EPSS)
0.62%

Vulnerability Summary

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 (nearly all write permissions), this vulnerability enables full repository takeover of jellyfin/jellyfin-ios, exfiltration of highly privileged secrets, Apple App Store supply chain attack, GitHub Container Registry (ghcr.io) package poisoning, and full jellyfin organization compromise via cross-repository token usage. Note: This is not a code vulnerability, but a vulnerability in the GitHub Actions workflows. No new version is required for this GHSA and end users do not need to take any actions.

Impacted Vendors

J
jellyfin 1

Reference Links

https://github.com/jellyfin/jellyfin-ios/commit/109217e75f38394b2f6e46e25dfe5a721203d3c8 https://github.com/jellyfin/jellyfin-ios/security/advisories/GHSA-7qhm-2m45-7fmh
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
10.0
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-31852 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/pvharmo2/gha-lab-3f1ff30e9c
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected Stack

No specific products linked.