OpenClaw: Zalo webhook rate limiting could be bypassed before secret validation
Summary
The Zalo webhook handler applied request rate limiting only after webhook authentication succeeded. Requests with an invalid secret returned 401 but did not count against the rate limiter, allowing repeated secret guesses without triggering 429.
Impact
This made brute-force guessing materially easier for weak but policy-compliant webhook secrets. Once the secret was guessed, an attacker could submit forged Zalo webhook traffic.
Affected versions
openclaw <= 2026.3.11
Patch
Fixed in openclaw 2026.3.12. Rate limiting now applies before successful authentication is required, closing the pre-auth brute-force gap. Users should update to 2026.3.12 or later and prefer strong webhook secrets.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | openclaw | < 2026.3.12 | 2026.3.12 |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-5m9r-p9g7-679c
- https://nvd.nist.gov/vuln/detail/CVE-2026-34505
- https://github.com/openclaw/openclaw/pull/44173
- https://github.com/openclaw/openclaw/commit/f96ba87f033a14183fa0ede912df3a592eef55ff
- https://github.com/openclaw/openclaw
- https://github.com/openclaw/openclaw/releases/tag/v2026.3.12
- https://www.vulncheck.com/advisories/openclaw-webhook-rate-limiting-bypass-via-pre-authentication-secret-validation
- 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-307- Platform
- npm
- Package
openclaw- Disclosed
- 13.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-5m9r-p9g7-679c - 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
- 588
- First → latest
- 02.2026 07.2026
- Without a fix
- 9
- Exploited in attacks
- 0
Severity breakdown
- Critical 20
- High 215
- Medium 299
- Low 54
Disclosures per year
- 2026: 588
-
OpenClaw: Zalo webhook rate limiting could be bypassed before secret validation this entry
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