Critical severity · published Mar 5, 2026
CVE-2026-28474
OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing
9.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
nextcloud-talk · OpenClaw
before 2026.2.6 · source: vendor
OP
Openclaw · Openclaw
before 2026.2.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28474
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28474
Patch
https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d
Patch
https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r
Broken Link
https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-via-actorname-display-name-spoofing