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Advisory record · GHSA-x4q3-gcj3-m6cf

gitea-runner: workflow container.options passes host namespaces and capability flags to job container when privileged mode is disabled

CVSS 9.9 CriticalCriticalEPSS 0.0054 · 45th percentile

Critical, because:

  • CVSS score 9.9: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 2 Oct 2026, 23:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
gitea.com/gitea/runnerGo<1.0.9-0.20260731160927-34bfa19150221.0.9-0.20260731160927-34bfa1915022
Identifiers
GHSA-x4q3-gcj3-m6cf · CVE-2026-73802 · GO-2026-6656
Weakness (CWE)
CWE-269
Tags
Published
2 Oct 2026
Updated
7 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Gitea runner (gitea.com/gitea/runner, Go) versions before 1.0.9-0.20260731160927-34bfa1915022 are vulnerable. When privileged mode is disabled, workflow-defined container options still allow host PID and IPC namespaces, extra capabilities and security profile overrides on the job container. A user who can submit a workflow to a shared runner can run commands as root on the runner host. Upgrade to 1.0.9-0.20260731160927-34bfa1915022 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.9 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0054, the 45th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:12 UTC First seen by agentprime
  2. 31 Oct 2026, 14:12 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.