What’s Vulnerable › Vulnerabilities

CVE-2026-28474: OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-05 · updated 2026-09-17
• Weakness: CWE-863

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.

Affected products

• OpenClaw: before 2026.2.6 — fixed in 2026.2.6

How to fix

Upgrade to a fixed version: OpenClaw 2026.2.6. Check the vendor advisory for mitigations.

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

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