CVE-2026-28474

CRITICAL

9.8

Description

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/5/2026

Last Modified3/9/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-863

References

https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d(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-via-actorname-display-name-spoofing(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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