CVE-2026-73802

Gitea Runner host isolation bypass through container options

State
Published
Severity
8.8 High
Published
Oct 14, 2026
Updated
Oct 18, 2026
Reserved
Aug 13, 2026

Read the record on cve.org

Description

Gitea Runner passes workflow-controlled container options into Docker job container configuration while privileged mode is disabled. Host namespace settings, expanded capabilities, and security profile overrides can remain effective despite Privileged being forced false. A workflow author able to run jobs on an affected Docker-backed runner can use these options to access host namespaces and execute commands as root on the runner host, bypassing the intended container isolation.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

  • CWE-269 Improper Privilege Management

Affected Products

ProductVersions
Gitea RunnerGitea
  • before 3.0.0Affected

References

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