User Impersonation Affecting @openclaw/matrix package, versions <2026.2.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-OPENCLAWMATRIX-15307826
- published18 Feb 2026
- disclosed17 Feb 2026
- creditJoshua Rogers
Introduced: 17 Feb 2026
CVE-2026-28471 (opens in a new tab)How to fix?
Upgrade @openclaw/matrix to version 2026.2.2 or higher.
Overview
@openclaw/matrix is an OpenClaw Matrix channel plugin
Affected versions of this package are vulnerable to User Impersonation via channels.matrix.dm.allowFrom. An attacker can impersonate an allowed identity and gain unauthorized access to the routing or agent pipeline by manipulating display names or MXID localparts to match allowlist entries.
Workaround
This vulnerability can be mitigated by ensuring allowlists contain only full Matrix user IDs (MXIDs) like @user:server or *, and not display names or bare localparts.