CVE-2026-35626

MEDIUM

OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhook

Title source: cna
STIX 2.1

Description

OpenClaw before 2026.3.22 contains an unauthenticated resource exhaustion vulnerability in voice call webhook handling that buffers request bodies before provider signature checks. Attackers can send large or malicious webhook requests to exhaust server resources without authentication by bypassing signature validation.

References (4)

Core 4
Core References
Third Party Advisory third-party-advisory
GitHub Security Advisory (GHSA-rm59-992w-x2mv)
https://github.com/openclaw/openclaw/security/advisories/GHSA-rm59-992w-x2mv
Third Party Advisory third-party-advisory
VulnCheck Advisory: OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhook
https://www.vulncheck.com/advisories/openclaw-unauthenticated-resource-exhaustion-via-voice-call-webhook

Scores

CVSS v3 5.3
EPSS 0.0049
EPSS Percentile 38.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-405
Status published
Products (4)
npm/openclaw 0 - 2026.3.22npm
OpenClaw/OpenClaw < 2026.3.22
openclaw/openclaw < 2026.3.22
OpenClaw/OpenClaw 2026.3.22
Published Apr 09, 2026
Tracked Since Apr 10, 2026