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Description

OpenClaw versions 2026.5.20 before 2026.6.6 contain an authorization bypass vulnerability in the MCP loopback feature that allows lower-trust callers to execute owner-only tools. Attackers can bypass authorization checks through configured input paths to execute or persist actions beyond their intended permissions.

PUBLISHED Reserved 2026-07-13 | Published 2026-07-13 | Updated 2026-07-14 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

HIGH: 8.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Problem types

Incorrect Permission Assignment for Critical Resource

Product status

Default status
unaffected

2026.5.20 (semver) before 2026.6.6
affected

2026.6.6 (semver)
unaffected

Credits

Edward-x (@YLChen-007) reporter

References

github.com/...enclaw/security/advisories/GHSA-52xj-c9p8-78cv (GitHub Security Advisory (GHSA-52xj-c9p8-78cv)) vendor-advisory

www.vulncheck.com/...w-authorization-bypass-via-mcp-loopback (VulnCheck Advisory: OpenClaw 2026.5.20 < 2026.6.6 Authorization Bypass via MCP loopback) third-party-advisory

cve.org (CVE-2026-62195)

nvd.nist.gov (CVE-2026-62195)

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