CVE-2026-73802 Gitea Runner host isolation bypass through container options
A workflow author can bypass container isolation in Gitea Runner to execute commands as root on the host system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73802?
CVE-2026-73802 is a high-severity vulnerability in Gitea Runner, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-269
Which versions are affected by CVE-2026-73802?
3 open source packages ship an affected version, including gitea.com/gitea/runner.
| Package | Affected | Fixed in |
|---|---|---|
gitea.com/gitea/runner Go | All versions | 1.0.9-0.20260731160927-34bfa1915022 |
gitea.com/gitea/runner Go | All versions | 1.0.9-0.20260731160927-34bfa1915022 |
gitea.com/gitea/runner Go | All versions | 1.0.9-0.20260731160927-34bfa1915022 |
How do I fix CVE-2026-73802?
Upgrade gitea.com/gitea/runner to 1.0.9-0.20260731160927-34bfa1915022 or later.
Is CVE-2026-73802 being exploited?
There is no known exploitation of CVE-2026-73802 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-DC26983, GHSA-x4q3-gcj3-m6cf, GO-2026-6656, MINI-6px9-7787-jwv6, MINI-fq68-5q79-q2j8.