Gitea act_runner – Container Hardening Bypass via Workflow Container Options_CVE-2026-58053

{
    "lastseen": "",
    "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.",
    "published": "2026-06-28T01:32:55.648Z",
    "modified": "2026-06-28T01:32:55.648Z",
    "type": "cve",
    "title": "Gitea act_runner - Container Hardening Bypass via Workflow Container Options",
    "source": "VulnCheck",
    "references": "https://github.com/bikini/exploitarium/tree/main/gitea-act-runner-container-options-poc\nhttps://www.vulncheck.com/advisories/gitea-act-runner-container-hardening-bypass-via-workflow-container-options",
    "id": "CVE-2026-58053",
    "bulletinFamily": "",
    "cwe": [
        "CWE-269"
    ],
    "cvelist": null,
    "sourceData": "Gitea act_runner 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.9,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "act_runner",
    "version": "0",
    "vendor": "Gitea",
    "ai_description": "Container Hardening Bypass via Workflow Container Options in Gitea act_runner",
    "ai_severity": "Critical",
    "ai_vendor": "Gitea",
    "ai_product": "act_runner",
    "ai_version": "0",
    "ai_score": 9.9
}