EUVD-2026-14563
GHSA-ffxm-98hg-x985
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Lifecycle Timeline
4Description
OpenClaw before 2026.2.25 lacks durable replay state for Nextcloud Talk webhook events, allowing valid signed requests to be replayed. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound processing and cause integrity or availability issues.
Analysis
OpenClaw before version 2026.2.25 fails to implement durable replay state validation for Nextcloud Talk webhook events, allowing attackers to capture and replay previously valid signed webhook requests to cause duplicate processing. This affects all versions of OpenClaw prior to the patched release, and an attacker with network access can exploit this vulnerability without authentication or user interaction to trigger integrity and availability impacts such as duplicate message processing or resource exhaustion.
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.
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External POC / Exploit Code
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