CVE-2026-53818

medium

Description

OpenClaw before 2026.4.24 contains an authorization bypass vulnerability in the MCP loopback feature that allows non-owner callers to skip owner-only tool policies and before-tool-call hooks. Attackers can invoke owner-only behavior through the affected loopback path to execute restricted tools when the feature is enabled and reachable.

References

Advisories

https://www.vulncheck.com/advisories/openclaw-owner-only-tool-policy-bypass-via-mcp-loopback

https://github.com/openclaw/openclaw/security/advisories/GHSA-rj6p-xmxr-qj4h

Details

Source: Mitre, NVD

Published: 2026-06-11

Updated: 2026-06-12

Risk Information

CVSS v2

Base Score: 5.7

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:C/A:P

Severity: Medium

CVSS v3

Base Score: 6.6

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

Severity: Medium

CVSS v4

Base Score: 6.9

Vector: 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

Severity: Medium

EPSS

EPSS: 0.00012