CVE-2026-35640
6.9
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
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OpenClaw | OpenClaw | 0 < 2026.3.25 | affected |
| OpenClaw | OpenClaw | 2026.3.25 | unaffected |
Weaknesses
- CWE-696: CWE-696: Incorrect Behavior Order
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456
- https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53
- https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing
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