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.
Published: 2026-03-05
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized Access to Restricted Conversations
Action: Apply Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r5h9-vjqc-hq3r Nextcloud Talk allowlist bypass via actor.name display name spoofing
History

Wed, 06 May 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Openclaw openclaw
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw openclaw

Mon, 09 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 06 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Openclaw
Openclaw nextcloud-talk
Vendors & Products Openclaw
Openclaw nextcloud-talk

Thu, 05 Mar 2026 22:15:00 +0000

Type Values Removed Values Added
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.
Title OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': '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'}


Subscriptions

Openclaw Nextcloud-talk Openclaw
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-09T18:08:50.134Z

Reserved: 2026-02-27T19:19:46.447Z

Link: CVE-2026-28474

cve-icon Vulnrichment

Updated: 2026-03-09T18:08:45.625Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-05T22:16:21.423

Modified: 2026-05-06T14:49:59.807

Link: CVE-2026-28474

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-16T12:00:11Z

Weaknesses