OpenClaw: Feishu webhook reads and parses unauthenticated request bodies before signature validation
Summary
Feishu webhook reads and parses unauthenticated request bodies before signature validation
Affected Packages / Versions
- Package:
openclaw - Affected versions:
<= 2026.3.24 - First patched version:
2026.3.25 - Latest published npm version at verification time:
2026.3.24
Details
Feishu webhook handling previously parsed JSON before signature validation, which let unauthenticated callers force full JSON parsing work before rejection. Commit 5e8cb22176e9235e224be0bc530699261eb60e53 reads the raw request body, validates the signature first, and only then parses JSON.
Verified vulnerable on tag v2026.3.24 and fixed on main by commit 5e8cb22176e9235e224be0bc530699261eb60e53.
Fix Commit(s)
5e8cb22176e9235e224be0bc530699261eb60e53
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | openclaw | < 2026.3.28 | 2026.3.28 |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456
- https://nvd.nist.gov/vuln/detail/CVE-2026-35640
- https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53
- https://github.com/openclaw/openclaw
- https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing
- CVSS 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- Weakness (CWE)
CWE-400- Platform
- npm
- Package
openclaw- Disclosed
- 29.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-3h52-cx59-c456 - CC BY 4.0
Vulnerability history: openclaw
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 589
- First → latest
- 02.2026 10.2026
- Without a fix
- 9
- Exploited in attacks
- 0
Severity breakdown
- Critical 20
- High 215
- Medium 300
- Low 54
Disclosures per year
- 2026: 589
-
OpenClaw: Feishu webhook reads and parses unauthenticated request bodies before signature validation this entry
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