CVE-2026-28474

CRITICAL EPSS 38.4%
Published Mar 5, 20263mo ago · Modified Jun 17, 20262w ago
9.3 CVSS 4.0
Critical
Find Similar
Published Mar 5, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
9.3
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
38.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

Affected Products 1

VendorProductVersionRange
openclawopenclaw* <2026.2.6

References 3

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

Remediation

  • github.com https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d
    Patch
  • github.com https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r
    PatchVendor Advisory