Vulnerability · Published Apr 28, 2026 · Assigned by VulnCheck

CVE-2026-42427OpenClaw < 2026.4.8 - Remote Code Execution via Build Tool Environment Variable Injection

Medium 5.3

In plain English

A medium-severity security flaw in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 91.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	openclaw	2026.4.8	GHSA-7437-7hg8-frrw

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	OpenClaw	0 – before 2026.4.8

Weakness: CWE-184 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

References

GitHub Security Advisory (GHSA-7437-7hg8-frrw) vendor-advisory
Patch Commit patch
VulnCheck Advisory: OpenClaw < 2026.4.8 - Remote Code Execution via Build Tool Environment Variable Injection third-party-advisory