CVE-2026-35640: OpenClaw · Incorrect Behavior Order
Affects OpenClawSource GCVE Database
Not known to be exploited · CVSS 6.9 Medium : upgrade to 2026.3.25 when convenient.
Data as of 12 Nov 2026, 03:03 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 6.9 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 5.3 |
- Patch
- Available – fixed in 2026.3.25
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 9 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Upgrade OpenClaw to 2026.3.25.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| OpenClaw OpenClaw | Affected
| Fixed in
|
AI-suggested
A fix is available in OpenClaw version 2026.3.25 and later, which corrects the order of operations to validate webhook signatures before parsing JSON bodies. Users should upgrade to version 2026.3.25 or later to remediate this vulnerability. No other mitigation or workaround is indicated.
Description
OpenClaw versions before 2026.3.25 have a vulnerability where JSON request bodies are parsed before webhook signatures are validated. This allows unauthenticated remote attackers to send malicious webhook requests that trigger resource-intensive JSON parsing, potentially causing a denial of service by exhausting server resources.
References
- github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456 (opens in a new tab)
- github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53 (opens in a new tab)
- vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing (opens in a new tab)