{"id":"CVE-2026-58053","state":"PUBLISHED","title":"Gitea act_runner - Container Hardening Bypass via Workflow Container Options","description":"Gitea act_runner with the Docker backend (through act 0.262.0) passes a workflow's container.options string to the Docker job container's HostConfig and, when configured with privileged: false, forces only the Privileged flag off while merging options such as --pid=host, --cap-add, and --security-opt unchanged. A user who can run a workflow on a Docker-backed runner can create a job container with host namespaces and broad capabilities and escape to the host as root despite privileged mode being disabled.","publishedAt":"2026-06-28T01:32:55.648Z","updatedAt":"2026-06-30T14:12:50.255Z","severity":{"score":9.4,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","source":"VulnCheck"},"assigner":"VulnCheck","products":["Gitea act_runner"],"affected":[{"vendor":"Gitea","product":"act_runner","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.262.0","versionType":"semver"}]}],"references":["https://github.com/bikini/exploitarium/tree/main/gitea-act-runner-container-options-poc","https://www.vulncheck.com/advisories/gitea-act-runner-container-hardening-bypass-via-workflow-container-options"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/58xxx/CVE-2026-58053.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-58053","state":"PUBLISHED","datePublished":"2026-06-28T01:32:55.648Z","dateUpdated":"2026-06-30T14:12:50.255Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-28T00:55:25.426Z"},"containers":{"cna":{"title":"Gitea act_runner - Container Hardening Bypass via Workflow Container Options","descriptions":[{"lang":"en","value":"Gitea act_runner with the Docker backend (through act 0.262.0) passes a workflow's container.options string to the Docker job container's HostConfig and, when configured with privileged: false, forces only the Privileged flag off while merging options such as --pid=host, --cap-add, and --security-opt unchanged. A user who can run a workflow on a Docker-backed runner can create a job container with host namespaces and broad capabilities and escape to the host as root despite privileged mode being disabled."}],"affected":[{"vendor":"Gitea","product":"act_runner","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.262.0","versionType":"semver"}]}],"references":[{"url":"https://github.com/bikini/exploitarium/tree/main/gitea-act-runner-container-options-poc","name":"Proof of Concept","tags":["exploit","third-party-advisory"]},{"url":"https://www.vulncheck.com/advisories/gitea-act-runner-container-hardening-bypass-via-workflow-container-options","name":"VulnCheck Advisory: Gitea act_runner - Container Hardening Bypass via Workflow Container Options","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL"}},{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":9.4,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-06-28T01:32:55.648Z"},"datePublic":"2026-06-23T00:00:00.000Z","credits":[{"lang":"en","value":"ashdfrkl","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-30T14:12:40.647304Z","id":"CVE-2026-58053","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-30T14:12:50.255Z"}}]}}}