CVE-2026-28474
published 2026-03-05CVE-2026-28474: 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…
PriorityP260critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.49%
38.3th percentile
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
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| openclaw | nextcloud-talk | < 2026.2.6 | 2026.2.6 |
| openclaw | nextcloud-talk | >= 0 < 2026.2.6 | 2026.2.6 |
| openclaw | openclaw | < 2026.2.6 | 2026.2.6 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.09.3CRITICALCVSS: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
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OSV
Nextcloud Talk allowlist bypass via actor.name display name spoofing
osv·2026-02-17
CVE-2026-28474 [CRITICAL] Nextcloud Talk allowlist bypass via actor.name display name spoofing
Nextcloud Talk allowlist bypass via actor.name display name spoofing
## Summary
In affected versions of the optional Nextcloud Talk plugin (installed separately; not bundled with the core OpenClaw install), an untrusted webhook field (`actor.name`, display name) could be treated as an allowlist identifier. An attacker could change their Nextcloud display name to match an allowlisted user ID and bypass DM or room allowlists.
## Details
Nextcloud Talk webhook payloads provide a stable sender identifier (`actor.id`) and a mutable display name (`actor.name`). In affected versions, the plugin’s allowlist matching accepted equality on the display name, which is attacker-controlled.
## Affected Packages / Versions
- Package: `@openclaw/nextcloud-talk` (npm)
- Affected: `= 2026.2.6`
Note: T
GHSA
Nextcloud Talk allowlist bypass via actor.name display name spoofing
ghsa·2026-02-17
CVE-2026-28474 [CRITICAL] CWE-290 Nextcloud Talk allowlist bypass via actor.name display name spoofing
Nextcloud Talk allowlist bypass via actor.name display name spoofing
## Summary
In affected versions of the optional Nextcloud Talk plugin (installed separately; not bundled with the core OpenClaw install), an untrusted webhook field (`actor.name`, display name) could be treated as an allowlist identifier. An attacker could change their Nextcloud display name to match an allowlisted user ID and bypass DM or room allowlists.
## Details
Nextcloud Talk webhook payloads provide a stable sender identifier (`actor.id`) and a mutable display name (`actor.name`). In affected versions, the plugin’s allowlist matching accepted equality on the display name, which is attacker-controlled.
## Affected Packages / Versions
- Package: `@openclaw/nextcloud-talk` (npm)
- Affected: `= 2026.2.6`
Note: T
No detection rules found.
No public exploits indexed.
2026-03-05
Published