CVE-2026-28474

critical · 9.3

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.

9.3

CVSS

0.5%

EPSS (exploit prob.)

41st

EPSS percentile

2026-03-05

Published

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-863

Affected products

Vendor	Product	Affected versions
openclaw	openclaw	< 2026.2.6

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-28474