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.
Published: 2026-04-09
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Resource exhaustion (Denial of Service)
Action: Patch Now
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-rm59-992w-x2mv OpenClaw is vulnerable to unauthenticated resource exhaustion through its voice call webhook handling
History

Tue, 14 Apr 2026 03:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 09 Apr 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhook
First Time appeared Openclaw
Openclaw openclaw
Weaknesses CWE-405
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw
Openclaw openclaw
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


Subscriptions

Openclaw Openclaw
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-14T03:09:10.668Z

Reserved: 2026-04-04T12:28:49.756Z

Link: CVE-2026-35626

cve-icon Vulnrichment

Updated: 2026-04-14T03:09:05.290Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-09T22:16:31.047

Modified: 2026-04-15T17:22:43.217

Link: CVE-2026-35626

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-10T09:28:36Z

Weaknesses