CVE-2026-35640
OpenClaw < 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-696 |
| Vendor | openclaw |
| Product | openclaw |
| Published | Apr 9, 2026 |
| Last Updated | Apr 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
OpenClaw / OpenClaw
0 < 2026.3.25
References
github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456 github.com: https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53 vulncheck.com: https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing
Credits
🔍 tdjackey