Is CVE-2026-42427 in the CISA KEV catalog?

No. CVE-2026-42427 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-42427?

CVE-2026-42427 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2026-42427?

CVE-2026-42427 has an EPSS score of 0.19% (9th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42427?

Upgrade openclaw to 2026.4.8 or later.

CVE & CISA-KEV Catalog

CVE-2026-42427

MEDIUM

5.3

CVSS v3

NVD

Description

OpenClaw before 2026.4.8 contains a remote code execution vulnerability caused by missing environment variable denylist entries for HGRCPATH, CARGO_BUILD_RUSTC_WRAPPER, RUSTC_WRAPPER, and MAKEFLAGS. Attackers can inject malicious build tool environment variables to influence host exec commands and achieve arbitrary code execution.

CWE-184

How to fix

Remediation Available

openclawNVD

Affected:< 2026.4.8Fixed in:2026.4.8CVE-2026-42427derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

Exploit Intelligence

0.19%probability of exploitation in 30 days

9thpercentile

Low risk: more likely to be exploited than 9% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Third-Party Advisory1

vulncheck.com

Embed a live status badge for CVE-2026-42427

Markdown

[![CVE-2026-42427](https://tridentstack.com/cve/badge/CVE-2026-42427.svg)](https://tridentstack.com/cve/CVE-2026-42427)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-42427"><img src="https://tridentstack.com/cve/badge/CVE-2026-42427.svg" alt="CVE-2026-42427"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-30.