{"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","slug":"CVE-2026-100541","body":"## Overview\n\nOpenClaw'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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}