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CVE-2026-35640
5.3 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): NETWORK
- Attack complexity (AC): LOW
- Privileges required (PR): NONE
- User interaction (UI): NONE
- Scope (S): UNCHANGED
- Confidentiality impact (C): NONE
- Integrity impact (I): NONE
- Availability impact (A): LOW
OpenClaw < 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing
OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook signatures, allowing unauthenticated attackers to force resource-intensive parsing operations. Remote attackers can send malicious webhook requests to trigger denial of service by exhausting server resources through forced JSON parsing before signature rejection.
References
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GitHub Security Advisory (GHSA-3h52-cx59-c456) third-party-advisory
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Patch Commit patch
Affected products
OpenClaw
- ==2026.3.25
- <2026.3.25
Package maintainers
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@mkg20001 Maciej Krüger <mkg20001+nix@gmail.com>
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@chrisportela Chris Portela <chris@chrisportela.com>