What’s Vulnerable › Vulnerabilities

CVE-2026-100541: OpenClaw Matrix before 2026.8.1 Authorization Bypass via Case Folding

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-26 · updated 2026-10-08
• Weakness: CWE-178

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

• openclaw matrix: from 2026.2.2 before 2026.8.1 — fixed in 2026.8.1

How to fix

Upgrade to a fixed version: openclaw matrix 2026.8.1. Check the vendor advisory for mitigations.

References

• https://github.com/openclaw/openclaw/security/advisories/GHSA-hgv5-f2r3-6v9r
• https://www.vulncheck.com/advisories/openclaw-matrix-before-2026.8.1-authorization-bypass-via-case-folding

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