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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
OpenClaw nextcloud-talk unaffected
Version Status Constraints
0 affected < 2026.2.6

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Project Subscriptions

No data.

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

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-05T22:28:13.938Z

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

Link: CVE-2026-28474

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-28474

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses