PatchSiren cyber security CVE debrief
CVE-2026-53820 OpenClaw CVE debrief
CVE-2026-53820 is a MEDIUM-severity vulnerability in OpenClaw, a software that contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path. This vulnerability allows authenticated callers to bypass intended command restrictions, potentially leading to unauthorized access or malicious activity.
- Vendor
- OpenClaw
- Product
- Unknown
- CVSS
- MEDIUM 6.9
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-12
- Original CVE updated
- 2026-06-12
- Advisory published
- 2026-06-12
- Advisory updated
- 2026-06-12
Who should care
Users of OpenClaw before version 2026.5.12 should be aware of this vulnerability and take necessary steps to update to a patched version.
Technical summary
The vulnerability has a CVSS score of 6.9 and is classified as CWE-862. It affects the OpenClaw software and can be exploited by authenticated callers to bypass command restrictions.
Defensive priority
MEDIUM
Recommended defensive actions
- Update OpenClaw to version 2026.5.12 or later.
- Review and restrict access to the affected bundle MCP loopback session-spawn path.
- Monitor for suspicious activity and implement additional security measures as needed.
Evidence notes
The CVE record was published on June 12, 2026, and has a CVSS vector of CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.
Official resources
CVE-2026-53820 was published on 2026-06-12T22:16:53.027Z