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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a701450959464782666…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-v…
disclosure@vulncheck.com