What is CVE-2026-42423?

CVE-2026-42423 is a high-severity vulnerability in Openclaw, classified under CWE-636. CVSS score: 7.5/10. Published 2026-04-28.

How severe is CVE-2026-42423?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Openclaw

CVE-2026-42423

OpenClaw before 2026.4.8 contains an approval-timeout fallback mechanism that bypasses strictInlineEval explicit-approval requirements on gateway and node exec hosts. Attackers can exploit this timeout fallback to execute inline eval commands that should require explicit user approval, circumventing the intended security boundary.

EPSS: 0.003 (24.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Openclaw — versions 0, 2026.4.8

Weakness classification (CWE)

CWE-636

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-2026-42423?: CVE-2026-42423 is a high-severity vulnerability in Openclaw, classified under CWE-636. CVSS score: 7.5/10. Published 2026-04-28.
How severe is CVE-2026-42423?: High severity. CVSS v3 base score is 7.5 out of 10.