{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58053", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-06-28T00:55:25.426Z", "datePublished": "2026-06-28T01:32:55.648Z", "dateUpdated": "2026-06-28T01:32:55.648Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-06-28T01:32:55.648Z"}, "datePublic": "2026-06-23T00:00:00.000Z", "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Privilege Management", "cweId": "CWE-269", "type": "CWE"}]}], "affected": [{"vendor": "Gitea", "product": "act_runner", "defaultStatus": "affected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "0.262.0"}]}], "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"}}], "references": [{"url": "https://github.com/bikini/exploitarium/tree/main/gitea-act-runner-container-options-poc", "name": "Proof of Concept", "tags": ["exploit", "third-party-advisory"]}, {"name": "VulnCheck Advisory: Gitea act_runner - Container Hardening Bypass via Workflow Container Options", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/gitea-act-runner-container-hardening-bypass-via-workflow-container-options"}], "credits": [{"lang": "en", "value": "ashdfrkl", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

{}

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