CVE-2026-53820

OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawn

State: Published
Severity: 6.9 Medium
Published: Jun 12, 2026
Updated: Jun 15, 2026
Reserved: Jun 10, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	VulnCheck
3.1	6.6 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L	VulnCheck

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.5.12Affected 2026.5.12Not affected

References

GitHub Security Advisory (GHSA-qh2f-99mv-mrcf)vendor-advisory
VulnCheck Advisory: OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawnthird-party-advisory

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