CVE-2026-53820 | THREATINT

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.

PUBLISHED Reserved 2026-06-10 | Published 2026-06-12 | Updated 2026-06-15 | Assigner VulnCheck

MEDIUM: 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

MEDIUM: 6.6CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

Problem types

Missing Authorization

Product status

Default status

unaffected

Any version before 2026.5.12

affected

2026.5.12 (semver)

unaffected

Credits

cantinagen reporter

Ellahi (@Ellahinator) finder

References

github.com/...enclaw/security/advisories/GHSA-qh2f-99mv-mrcf (GitHub Security Advisory (GHSA-qh2f-99mv-mrcf)) vendor-advisory

www.vulncheck.com/...ss-in-bundle-mcp-loopback-session-spawn (VulnCheck Advisory: OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawn) third-party-advisory

cve.org (CVE-2026-53820)

nvd.nist.gov (CVE-2026-53820)

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