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Description

OpenClaw versions from 2026.2.22 before 2026.4.12 contain an insufficient shell-wrapper detection vulnerability allowing attackers to inject environment variable assignments at the argv level. Attackers can bypass exec preflight handling to manipulate high-risk shell variables like SHELLOPTS and PS4, affecting execution semantics and security controls.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-05 | Updated 2026-05-06 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-184: Incomplete List of Disallowed Inputs

Product status

Default status
unaffected

2026.2.22 (semver) before 2026.4.12
affected

2026.4.12 (semver)
unaffected

References

github.com/...enclaw/security/advisories/GHSA-j6c7-3h5x-99g9 (GitHub Security Advisory (GHSA-j6c7-3h5x-99g9)) vendor-advisory

github.com/...ommit/8f8492d172f4c5b4fd7dd9a47855ed620c8770ab (Patch Commit) patch

www.vulncheck.com/...vironment-variable-assignment-injection (VulnCheck Advisory: OpenClaw 2026.2.22 < 2026.4.12 - Shell-Wrapper Detection Bypass via Environment Variable Assignment Injection) third-party-advisory

cve.org (CVE-2026-42435)

nvd.nist.gov (CVE-2026-42435)

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