---
id: CVE-2026-100541
title: >-
  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…
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-178
vendor: openclaw
product: matrix
affected:
  - matrix >= 2026.2.2 < 2026.8.1
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T03:16:59.987'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100541'
references:
  - url: >-
      https://github.com/openclaw/openclaw/security/advisories/GHSA-hgv5-f2r3-6v9r
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openclaw-matrix-before-2026.8.1-authorization-bypass-via-case-folding
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T03:25:24.678Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.