CVE-2026-28474CRITICAL 9.8EPSS p38.1%

CVE-2026-28474CVE-2026-28474

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.49% probability of exploitation · percentile 38.1% · 2026-06-19T12:03:05Z
Published2026-03-05
Last modified2026-05-06

Underlying weaknesses· 1

CWE-863

References

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

1

TypeTargetConfidenceTier
WeaknessIncorrect Authorizationcwe-8630%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.