CVE-2026-58053

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.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
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

Configurations

No configuration.

History

28 Jun 2026, 02:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-28 02:16

Updated : 2026-06-30 15:17

NVD link : CVE-2026-58053

Mitre link : CVE-2026-58053

CVE.ORG link : CVE-2026-58053

JSON object : View

Products Affected

No product.

CWE

CWE-269

Improper Privilege Management

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