What is CVE-2026-34505?

CVE-2026-34505 is a medium-severity vulnerability in Openclaw, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 6.5/10. Published 2026-03-31.

How severe is CVE-2026-34505?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Openclaw

CVE-2026-34505

OpenClaw before 2026.3.12 applies rate limiting only after successful webhook authentication, allowing attackers to bypass rate limits and brute-force webhook secrets. Attackers can submit repeated authentication requests with invalid secr…

EPSS: 0.000 (7.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Openclaw — versions 0, 2026.3.12

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

GitHub Security Advisory (GHSA-5m9r-p9g7-679c) (third-party-advisory)
VulnCheck Advisory: OpenClaw < 2026.3.12 - Webhook Rate Limiting Bypass via Pre-Authentication Secret Validation (third-party-advisory)

Frequently asked questions

What is CVE-2026-34505?: CVE-2026-34505 is a medium-severity vulnerability in Openclaw, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 6.5/10. Published 2026-03-31.
How severe is CVE-2026-34505?: Medium severity. CVSS v3 base score is 6.5 out of 10.