CVE-2026-28449: Openclaw

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.

Affected products

• Openclaw Openclaw: before 2026.2.25 (fixed in 2026.2.25)

Published 2026-03-19. Last modified 2026-06-17.