PatchSiren cyber security CVE debrief
CVE-2026-53861 OpenClaw CVE debrief
CVE-2026-53861 is a MEDIUM severity vulnerability in OpenClaw before version 2026.5.6. The vulnerability is caused by an allowlist bypass in the macOS Swift exec feature, which misses combined POSIX inline-command flags. This allows attackers to execute shell content outside the intended allowlist check by using combined flag forms, potentially allowing unauthorized command execution depending on operator configuration. The vulnerability has a CVSS score of 5.3 and was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-53861).
- Vendor
- OpenClaw
- Product
- Unknown
- CVSS
- MEDIUM 5.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-16
- Original CVE updated
- 2026-06-18
- Advisory published
- 2026-06-16
- Advisory updated
- 2026-06-18
Who should care
Users of OpenClaw before version 2026.5.6, especially those using the macOS Swift exec feature, should be aware of this vulnerability and take steps to mitigate it.
Technical summary
The vulnerability is caused by an allowlist bypass in the macOS Swift exec feature, which misses combined POSIX inline-command flags.
Defensive priority
MEDIUM
Recommended defensive actions
- Update OpenClaw to version 2026.5.6 or later.
- Review and restrict the use of combined POSIX inline-command flags in the macOS Swift exec feature.
- Monitor for suspicious activity and implement additional security measures as needed.
Evidence notes
The vulnerability was reported by Vulncheck and is tracked under [ref-4](https://github.com/openclaw/openclaw/security/advisories/GHSA-c226-q6fx-6j6c) and [ref-5](https://www.vulncheck.com/advisories/openclaw-allowlist-bypass-via-combined-posix-inline-flags-on-macos).
Official resources
CVE-2026-53861 was published on 2026-06-16T19:17:04.027Z and modified on 2026-06-16T20:42:46.200Z.