CVE-2026-28474
Last modified
CVE-2026-28474 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openclaw | Openclaw | < 2026.2.6 |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3rPatch, Vendor Advisory
- https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-via-actorname-display-name-spoofingBroken Link, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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