What is CVE-2026-43534?

CVE-2026-43534 is a critical-severity vulnerability in Openclaw, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-05-05.

How severe is CVE-2026-43534?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Openclaw

CVE-2026-43534

OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent…

EPSS: 0.002 (8.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Openclaw — versions 0, 2026.4.10

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

disclosure@vulncheck.com (vendor-advisory, Vendor Advisory)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-43534?: CVE-2026-43534 is a critical-severity vulnerability in Openclaw, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-05-05.
How severe is CVE-2026-43534?: Critical severity. CVSS v3 base score is 9.1 out of 10.