CVE-2026-42427: OpenClaw: 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)

April 9, 2026 (updated April 28, 2026)

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.

References

github.com/advisories/GHSA-7437-7hg8-frrw
github.com/openclaw/openclaw
github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5
github.com/openclaw/openclaw/security/advisories/GHSA-7437-7hg8-frrw
nvd.nist.gov/vuln/detail/CVE-2026-42427

Code Behaviors & Features

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