CVE-2026-53820 — MEDIUM (6.6)

Q: How severe is CVE-2026-53820?

CVE-2026-53820 has been rated MEDIUM with a CVSS base score of 6.6/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-53820?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.

Vulnerability Description

OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attackers can reach the affected bundled MCP session-spawn path to start sessions with broader command reach than intended.

CVSS Score

6.6

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

HIGH

Availability

LOW

Affected Products

Vendor	Product	Versions
Openclaw	Openclaw	< 2026.5.12

Related Weaknesses (CWE)

CWE-862

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-qh2f-99mv-mrcfMitigationVendor Advisory
https://www.vulncheck.com/advisories/openclaw-exec-denylist-bypass-in-bundle-mcpThird Party Advisory

FAQ

What is CVE-2026-53820?

CVE-2026-53820 is a vulnerability with a CVSS score of 6.6 (MEDIUM). OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attack...

How severe is CVE-2026-53820?

CVE-2026-53820 has been rated MEDIUM with a CVSS base score of 6.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-53820?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.