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Description

OpenClaw versions prior to 2026.2.2 fail to properly validate Windows cmd.exe metacharacters in allowlist-gated exec requests (non-default configuration), allowing attackers to bypass command approval restrictions. Remote attackers can craft command strings with shell metacharacters like & or %...% to execute unapproved commands beyond the allowlisted operations.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-05 | Updated 2026-03-06 | Assigner VulnCheck




CRITICAL: 9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Incomplete List of Disallowed Inputs

Product status

Default status
unaffected

Any version before 2026.2.2
affected

Credits

Petr Simecek (@simecek) reporter

Stanislav Fort, Aisle Research, www.aisle.com analyst

References

github.com/...enclaw/security/advisories/GHSA-qj77-c3c8-9c3q (GitHub Security Advisory (GHSA-qj77-c3c8-9c3q)) vendor-advisory

github.com/...ommit/a7f4a53ce80c98ba1452eb90802d447fca9bf3d6 (Patch Commit) patch

www.vulncheck.com/...parsing-bypass-in-allowlist-enforcement (VulnCheck Advisory: OpenClaw < 2026.2.2 - Command Injection via cmd.exe Parsing Bypass in Allowlist Enforcement) third-party-advisory

cve.org (CVE-2026-28391)

nvd.nist.gov (CVE-2026-28391)

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