CVE-2026-58053
Gitea act_runner - Container Hardening Bypass via Workflow Container Options
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-269 |
| Vendor | gitea |
| Product | act_runner |
| Published | Jun 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Gitea / act_runner
0 ≤ 0.262.0
References
Credits
ashdfrkl