SB2026050461 - Improper access control in OpenClaw

Description

This security bulletin contains information about 1 vulnerability.

1) Improper access control (CVE-ID: CVE-2026-28474)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to bypass DM or room allowlists.

The vulnerability exists due to improper access control in the allowlist matching logic when processing Nextcloud Talk webhook payloads. A remote user can change their Nextcloud display name to match an allowlisted user ID to bypass DM or room allowlists.

Only the separately installed optional Nextcloud Talk plugin is affected; core OpenClaw is not impacted unless this plugin is installed and used.

Remediation

Install update from vendor's website.

References

• https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r
• https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d