CVE-2026-28474
CRITICAL severity · CVSS 9.8 · Incorrect authorization
9.8CVSS CRITICAL
Summary
OpenClaw's Nextcloud Talk plugin versions prior to 2026.2.6 accept equality matching on the mutable actor.name display name field for allowlist validation, allowing attackers to bypass DM and room allowlists. An attacker can change their Nextcloud display name to match an allowlisted user ID and gain unauthorized access to restricted conversations.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d ↗
Additional information
- NVD record
- https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892dPatch
- https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3rPatch
- https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-via-actorname-display-name-spoofingAdvisory