CVE-2026-34508: Duplicate Advisory: OpenClaw has Bypass in Webhook Rate Limiting via Pre-Authentication Secret Validation

March 31, 2026 (updated April 7, 2026)

Duplicate Advisory

This advisory has been withdrawn because CVE-2026-34508 has been rejected as a duplicate of CVE-2026-34505. This link is maintained to preserve external references.

Original Description

OpenClaw before 2026.3.12 applies rate limiting only after webhook authentication succeeds, allowing attackers to bypass rate limits and brute-force webhook secrets without triggering 429 responses. Attackers can repeatedly guess invalid secrets to discover valid credentials and subsequently submit forged Zalo webhook traffic.

References

github.com/advisories/GHSA-8288-jpqp-95fx
github.com/openclaw/openclaw
github.com/openclaw/openclaw/security/advisories/GHSA-5m9r-p9g7-679c
nvd.nist.gov/vuln/detail/CVE-2026-34508
www.vulncheck.com/advisories/openclaw-webhook-rate-limiting-bypass-via-pre-authentication-secret-validation-2

Code Behaviors & Features

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