What is CVE-2026-42438?

CVE-2026-42438 is a high-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 7.7/10. Published 2026-05-05.

How severe is CVE-2026-42438?

High severity. CVSS v3 base score is 7.7 out of 10.

Auth bypass in Openclaw

CVE-2026-42438

OpenClaw versions 2026.4.9 before 2026.4.10 contain a sender policy bypass vulnerability in the outbound host-media attachment read helper that allows unauthorized local file disclosure. Attackers with denied read access via toolsBySender…

Vulnerability class: Broken Access Control

EPSS: 0.000 (9.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Openclaw — versions 2026.4.9, 2026.4.10

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

GitHub Security Advisory (GHSA-jhpv-5j76-m56h) (vendor-advisory, Vendor Advisory)
Patch Commit (Patch, patch)
VulnCheck Advisory: OpenClaw 2026.4.9 < 2026.4.10 - Sender Policy Bypass in Host Media Attachment Reads (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-42438?: CVE-2026-42438 is a high-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 7.7/10. Published 2026-05-05.
How severe is CVE-2026-42438?: High severity. CVSS v3 base score is 7.7 out of 10.