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.
CVE-2026-58053
Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-28. a secondary CVSS source baseline 9.9; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.9
- EG Score
- 9.9(high)
- EPSS
- 17.9%
- KEV
- Not listed
Published
June 28, 2026
Last Modified
June 30, 2026
Advisory Details (2)
Auto-updated Jun 30, 2026Gitea act_runner - Container Hardening Bypass via Workflow Container Options | Advisories | VulnCheck
https://www.vulncheck.com/advisories/gitea-act-runner-container-hardening-bypass-via-workflow-container-optionsexploitarium/gitea-act-runner-container-options-poc at main · bikini/exploitarium · GitHub
https://github.com/bikini/exploitarium/tree/main/gitea-act-runner-container-options-pocVendor Advisories for CVE-2026-58053(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 88× in last 7d / 114× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 114 total refreshes for this CVE.
- 2026-07-07 01:07 UTCEG score recompute
- 2026-07-07 01:07 UTCGHSA enrichment
- 2026-07-06 20:50 UTCEG score recompute
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- 2026-07-06 02:23 UTCEPSS rescore
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- 2026-07-05 23:15 UTCEG score recompute
- 2026-07-05 23:15 UTCGHSA enrichment
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- 2026-07-05 06:02 UTCGHSA enrichment
- 2026-07-05 02:31 UTCEPSS rescore
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- 2026-07-03 06:48 UTCEG score recompute
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- 2026-07-03 02:29 UTCEG score recompute
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- 2026-07-01 20:23 UTCEG score recompute
- 2026-07-01 20:23 UTCGHSA enrichment
- 2026-07-01 16:06 UTCEG score recompute
- 2026-07-01 16:06 UTCGHSA enrichment
- 2026-07-01 15:07 UTCEPSS rescore
- 2026-07-01 11:45 UTCEG score recompute
- 2026-07-01 11:45 UTCGHSA enrichment
- 2026-07-01 07:28 UTCEG score recompute
- 2026-07-01 07:28 UTCGHSA enrichment
- 2026-07-01 03:11 UTCEG score recompute
- 2026-07-01 03:11 UTCGHSA enrichment
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-30 22:54 UTCEG score recompute
- 2026-06-30 22:54 UTCGHSA enrichment
- 2026-06-30 18:37 UTCEG score recompute
- 2026-06-30 18:37 UTCGHSA enrichment
- 2026-06-30 14:20 UTCEG score recompute
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- 2026-06-29 14:06 UTCEPSS rescore
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- 2026-06-29 08:17 UTCEG score recompute
- 2026-06-29 08:17 UTCGHSA enrichment
- 2026-06-29 03:59 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-269
Frequently asked(5)
What is CVE-2026-58053?
When was CVE-2026-58053 disclosed?
Is CVE-2026-58053 actively exploited?
What is the CVSS score of CVE-2026-58053?
How do I remediate CVE-2026-58053?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-58053
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