Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openclaw | Openclaw | < 2026.2.25 |
Related Weaknesses (CWE)
References
- https://github.com/openclaw/openclaw/commit/d512163d686ad6741783e7119ddb3437f493Patch
- https://github.com/openclaw/openclaw/security/advisories/GHSA-r9q5-c7qc-p26wMitigationVendor Advisory
- https://www.vulncheck.com/advisories/openclaw-webhook-replay-attack-via-missing-Third Party Advisory
FAQ
What is CVE-2026-28449?
CVE-2026-28449 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 r...
How severe is CVE-2026-28449?
CVE-2026-28449 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-28449?
Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.