Jellyfin GitHub Action code-quality.yml privileges management

CVSS Meta Temp Score
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CTI Interest Score
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8.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Jellyfin. This affects an unknown part of the file code-quality.yml of the component GitHub Action Handler. The manipulation results in privileges management. This vulnerability is cataloged as CVE-2026-31852. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Jellyfin (affected version unknown). It has been classified as critical. Affected is an unknown functionality of the file code-quality.yml of the component GitHub Action Handler. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-31852 since 03/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Applying the patch 109217e75f38394b2f6e46e25dfe5a721203d3c8 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-11242). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 8.9

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 10.0
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 109217e75f38394b2f6e46e25dfe5a721203d3c8

Timelineinfo

03/09/2026 CVE reserved
03/11/2026 +2 days Advisory disclosed
03/11/2026 +0 days VulDB entry created
03/20/2026 +9 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-7qhm-2m45-7fmh
Status: Confirmed

CVE: CVE-2026-31852 (🔒)
GCVE (CVE): GCVE-0-2026-31852
GCVE (VulDB): GCVE-100-350484
EUVD: 🔒

Entryinfo

Created: 03/11/2026 19:42
Updated: 03/20/2026 19:46
Changes: 03/11/2026 19:42 (65), 03/11/2026 20:33 (1), 03/14/2026 16:38 (1), 03/20/2026 19:46 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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