CVE-2026-34505
OpenClaw: Zalo webhook rate limiting could be bypassed before secret validation
Impact
### 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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | openclaw | <= 2026.3.11 | 2026.3.12 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openclaw | Openclaw | before 2026.3.12 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/openclaw/openclaw/security/advisories/GHSA-5m9r-p9g7-679c
- https://www.vulncheck.com/advisories/openclaw-webhook-rate-limiting-bypass-via-pre-authentication-secret-validation
- https://github.com/advisories/GHSA-5m9r-p9g7-679c
- https://github.com/openclaw/openclaw/pull/44173
- https://github.com/openclaw/openclaw/commit/f96ba87f033a14183fa0ede912df3a592eef55ff
- https://github.com/openclaw/openclaw/releases/tag/v2026.3.12
- https://nvd.nist.gov/vuln/detail/CVE-2026-34505