Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck
CVE-2026-100541OpenClaw Matrix before 2026.8.1 Authorization Bypass via Case Folding
High 7.5
In plain English
A high-severity security flaw in matrix from openclaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).
Official description
OpenClaw's Matrix integration (npm package @openclaw/matrix) versions >= 2026.2.2 and < 2026.8.1 lowercase complete Matrix user IDs — including historical localparts and the case-sensitive server-name portion — when deriving the OpenClaw authorization identity. As a result, distinct authenticated Matrix accounts can normalize to the same authorization identity. A Matrix participant controlling a colliding account identifier (a protocol-valid identifier that differs from the configured one only by characters OpenClaw case/Unicode folds; display-name matching is not required) can inherit allowlist, owner-command, exec-approval, or plugin-approval authority configured for another account. The issue is fixed in 2026.8.1.
Affected products (as reported)
Weakness: CWE-178 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-hgv5-f2r3-6v9r) vendor-advisory
- VulnCheck Advisory: OpenClaw Matrix before 2026.8.1 Authorization Bypass via Case Folding third-party-advisory