Vulnerability · Published Mar 5, 2026 · Assigned by VulnCheck

CVE-2026-28474OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing

Critical 9.8

In plain English

A critical-severity incorrect authorization in nextcloud-talk from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.6%top 53.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@openclaw/nextcloud-talk	2026.2.6	GHSA-r5h9-vjqc-hq3r

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	nextcloud-talk	0 – before 2026.2.6

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-r5h9-vjqc-hq3r) vendor-advisory
Patch Commit #1 patch
VulnCheck Advisory: OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing third-party-advisory