CVE-2026-53836 | THREATINT

Description

OpenClaw before 2026.5.12 contains an allowlist bypass vulnerability in PowerShell encoded-command handling that allows attackers to execute encoded commands using abbreviated flag aliases not recognized by the allowlist parser. Remote authenticated operators can bypass execution allowlist checks by using unrecognized encoded-command alias forms to execute arbitrary PowerShell content.

PUBLISHED Reserved 2026-06-10 | Published 2026-06-12 | Updated 2026-06-15 | 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

Incomplete List of Disallowed Inputs

Product status

Default status

unaffected

Any version before 2026.5.12

affected

2026.5.12 (semver)

unaffected

Credits

Edward-x (@YLChen-007) reporter

References

github.com/...enclaw/security/advisories/GHSA-j472-gf56-x589 (GitHub Security Advisory (GHSA-j472-gf56-x589)) vendor-advisory

www.vulncheck.com/...-via-powershell-encoded-command-aliases (VulnCheck Advisory: OpenClaw < 2026.5.12 - Allowlist Bypass via PowerShell Encoded-Command Aliases) third-party-advisory

cve.org (CVE-2026-53836)

nvd.nist.gov (CVE-2026-53836)

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