Vulnerability DatabaseCVE-2026-35640
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CVE-2026-35640
Published:April 09, 2026
Updated:April 20, 2026
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.
Affected Packages
https://github.com/openclaw/openclaw.git (GITHUB):
Affected version(s) >=v0.1.0 <2026.3.25
Fix Suggestion:
Update to version 2026.3.25
openclaw (NPM):
Affected version(s) >=0.0.1 <2026.3.25
Fix Suggestion:
Update to version 2026.3.25
openclaw (NPM):
Affected version(s) >=0.0.1 <2026.3.28
Fix Suggestion:
Update to version 2026.3.28
Related Resources (5)
https://github.com/openclaw/openclaw
https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing
https://nvd.nist.gov/vuln/detail/CVE-2026-35640
https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Incorrect Behavior Order
CWE-696
Uncontrolled Resource Consumption
CWE-400
EPSS
Base Score:
0.12