{"id":"CVE-2026-73802","state":"PUBLISHED","title":"Gitea Runner host isolation bypass through container options","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.","publishedAt":"2026-10-14T14:37:55.141Z","updatedAt":"2026-10-18T13:34:49.826Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"Gitea","products":["Gitea Gitea Runner"],"affected":[{"vendor":"Gitea","product":"Gitea Runner","packageName":"gitea.com/gitea/runner","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.0.0","versionType":"semver"}]}],"references":["https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf","https://blog.gitea.com/release-of-runner-3.0.0/","https://gitea.com/gitea/runner/releases/tag/v3.0.0"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73802.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73802","state":"PUBLISHED","datePublished":"2026-10-14T14:37:55.141Z","dateUpdated":"2026-10-18T13:34:49.826Z","assignerShortName":"Gitea","assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","dateReserved":"2026-08-13T16:50:59.169Z"},"containers":{"cna":{"title":"Gitea Runner host isolation bypass through container options","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Gitea","product":"Gitea Runner","packageName":"gitea.com/gitea/runner","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.0.0","versionType":"semver"}]}],"references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf","name":"GitHub Security Advisory GHSA-x4q3-gcj3-m6cf","tags":["vendor-advisory"]},{"url":"https://blog.gitea.com/release-of-runner-3.0.0/","name":"Gitea Runner 3.0.0 release announcement","tags":["release-notes"]},{"url":"https://gitea.com/gitea/runner/releases/tag/v3.0.0","name":"gitea/runner v3.0.0 release","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","type":"CWE","description":"CWE-269: Improper Privilege Management"}]}],"providerMetadata":{"shortName":"Gitea","orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","dateUpdated":"2026-10-14T14:37:55.141Z"},"credits":[{"lang":"en","value":"https://github.com/sn0x-sharma","type":"reporter"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.8,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-18T13:34:45.738812Z","id":"CVE-2026-73802","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-18T13:34:49.826Z"}}]}}}