CVE-2026-28474

OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing

CVSS 9.3 CRITICALEPSS 0.5%CWE-863

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.3EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

05 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

OpenClaw · nextcloud-talk

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References

https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-via-actorname-display-name-spoofing