Vulnerability-Lookup

GHSA-8QF9-PC52-J7CM

Vulnerability from github – Published: 2026-06-28 03:33 – Updated: 2026-06-28 03:33

Details

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.

Severity

9.9 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

9.4 (Critical)


                  
                    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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-58053"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-28T02:16:32Z",
    "severity": "CRITICAL"
  },
  "details": "Gitea act_runner with the Docker backend (through act 0.262.0) passes a workflow\u0027s container.options string to the Docker job container\u0027s 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.",
  "id": "GHSA-8qf9-pc52-j7cm",
  "modified": "2026-06-28T03:33:40Z",
  "published": "2026-06-28T03:33:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58053"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bikini/exploitarium/tree/main/gitea-act-runner-container-options-poc"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/gitea-act-runner-container-hardening-bypass-via-workflow-container-options"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-58053 (GCVE-0-2026-58053)

Vulnerability from cvelistv5 – Published: 2026-06-28 01:32 – Updated: 2026-06-28 01:32

Title

Gitea act_runner - Container Hardening Bypass via Workflow Container Options

Summary

Severity

9.9 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

9.4 (Critical)


                        
                          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

CWE

CWE-269 - Improper Privilege Management

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/bikini/exploitarium/tree/main/…	exploitthird-party-advisory
https://www.vulncheck.com/advisories/gitea-act-ru…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Gitea	act_runner	Affected: 0 , ≤ 0.262.0 (semver)

Date Public

2026-06-23 00:00

Credits

ashdfrkl

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "act_runner",
          "vendor": "Gitea",
          "versions": [
            {
              "lessThanOrEqual": "0.262.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "ashdfrkl"
        }
      ],
      "datePublic": "2026-06-23T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Gitea act_runner with the Docker backend (through act 0.262.0) passes a workflow\u0027s container.options string to the Docker job container\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        },
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-269",
              "description": "Improper Privilege Management",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-28T01:32:55.648Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Proof of Concept",
          "tags": [
            "exploit",
            "third-party-advisory"
          ],
          "url": "https://github.com/bikini/exploitarium/tree/main/gitea-act-runner-container-options-poc"
        },
        {
          "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"
        }
      ],
      "title": "Gitea act_runner - Container Hardening Bypass via Workflow Container Options",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-58053",
    "datePublished": "2026-06-28T01:32:55.648Z",
    "dateReserved": "2026-06-28T00:55:25.426Z",
    "dateUpdated": "2026-06-28T01:32:55.648Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-8QF9-PC52-J7CM

CVE-2026-58053 (GCVE-0-2026-58053)

Tags

Sightings

Nomenclature