CVE-2026-28474

CRITICAL

OpenClaw Nextcloud Talk <2026.2.6 - Auth Bypass

Title source: llm

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.

References (3)

[Patch] https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d

View Patch ZIP pw:eip

[Vendor Advisory] https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r

[Third Party Advisory] https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-via-actorname-display-name-spoofing

Scores

CVSS v3 9.8

EPSS 0.0004

EPSS Percentile 11.5%

Attack Vector NETWORK

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

Classification

CWE

CWE-863

Status draft

Timeline

Published Mar 05, 2026

Tracked Since Mar 06, 2026