This advisory has been withdrawn because CVE-2026-34508 has been rejected as a duplicate of CVE-2026-34505.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.
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.
{
"cwe_ids": [
"CWE-307"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-07T18:04:56Z",
"nvd_published_at": "2026-03-31T12:16:30Z",
"severity": "MODERATE"
}