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.

INFO

Published Date :

2026-03-19T01:00:45.387Z

Last Modified :

2026-04-29T14:35:22.725Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2026-28449 vulnerability.

Vendors Products
Openclaw
  • Openclaw
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-28449.

URL Resource
https://github.com/openclaw/openclaw/commit/d512163d686ad6741783e7119ddb3437f493dbbc cve-icon cve-icon
https://github.com/openclaw/openclaw/security/advisories/GHSA-r9q5-c7qc-p26w cve-icon cve-icon
https://www.vulncheck.com/advisories/openclaw-webhook-replay-attack-via-missing-durable-replay-suppression cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact