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BREW-openclaw-cli-CVE-2026-42427 — OpenClaw: HGRCPATH, CARGO_BUILD_RUSTC_WRAPPER, RUSTC_WRAPPER, and MAKEFLAGS missing from exec env denylist — RCE via bu…

Affected: Homebrew: openclaw-cli

## Impact

HGRCPATH, CARGO_BUILD_RUSTC_WRAPPER, RUSTC_WRAPPER, and MAKEFLAGS missing from exec env denylist — RCE via build tool env injection (GHSA-cm8v-2vh9-cxf3 class).

Missing denylist entries allowed hostile build-tool environment variables to influence host exec commands.

OpenClaw is a user-controlled local assistant. This advisory is scoped to the OpenClaw trust model and does not assume a multi-tenant service boundary.

## Affected Packages / Versions

- Package: `openclaw` (npm) - Affected versions: `< 2026.4.8` - Patched versions: `2026.4.8`

## Fix

The issue was fixed on `main` and is available in the patched npm version listed above. The verified fixed tree is commit `d7c3210cd6f5fdfdc1beff4c9541673e814354d5`.

## Verification

The fix was re-checked against `main` before publication, including targeted regression tests for the affected security boundary.

## Credits Thanks @boy-hack of Tencent zhuque Lab (https://github.com/Tencent/AI-Infra-Guard) for reporting.

EUVD-2026-307906

fkie_cve-2026-42427

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.

GHSA-7437-7hg8-frrw — OpenClaw: HGRCPATH, CARGO_BUILD_RUSTC_WRAPPER, RUSTC_WRAPPER, and MAKEFLAGS missing from exec env denylist — RCE via bu…

Affected: npm: openclaw