CVE-2026-28449

MEDIUM6.5

OpenClaw < 2026.2.25 - Webhook Replay Attack via Missing Durable Replay Suppression

Published Mar 19, 2026

Modified 2 days ago

Details

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.

References

FIX

https://github.com/openclaw/openclaw/commit/d512163d686ad6741783e7119ddb3437f493dbbc

ADVISORY

https://github.com/openclaw/openclaw/security/advisories/GHSA-r9q5-c7qc-p26w

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-28449

ADVISORY

https://www.vulncheck.com/advisories/openclaw-webhook-replay-attack-via-missing-durable-replay-suppression

CVSS Analysis

CVSS v4.0

6.3