NVD HIGH: CVE-2026-35640 — OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook s...

Thursday, April 9, 2026 at 10:16 PM UTC·Source: NIST NVD

Updated: Wednesday, April 15, 2026 at 10:17 PM UTC

Executive Summary

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.

Analysis

Indicators of Compromise (1)

CVE (1)

CVE-2026-35640

NVD MITRE CVE

Source Attribution

Originally published by NIST NVD on Apr 9, 2026. Verified by: NIST.

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