---
cve: "CVE-2026-58053"
severity: "CRITICAL"
cvss: 9.4
epss: "26%"
vendor: "Gitea"
kev: false
exploited: false
published: "2026-06-28 02:16:32"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T13:06:24+02:00"
---

# CVE-2026-58053

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-58053) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_