High severity · published Oct 14, 2026
CVE-2026-73802
Gitea Runner host isolation bypass through container options
8.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Gitea Runner · Gitea
before 3.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73802
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73802
vendor-advisory
https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf
release-notes
https://blog.gitea.com/release-of-runner-3.0.0/
release-notes
https://gitea.com/gitea/runner/releases/tag/v3.0.0
