CVE-2026-53836 | OpenClaw before 2026.5.12 contains an allowlist bypass vulne… | CVSS 8.8 HIGH

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.

Metadata

CVE ID: CVE-2026-53836
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-10 21:19 UTC
Published: 2026-06-12 21:56 UTC
Last updated: 2026-06-15 17:22 UTC
Primary CWE: CWE-184
Incomplete List of Disallowed Inputs
Vendor / Product: OpenClaw / OpenClaw
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
OpenClaw	OpenClaw	—	0 < 2026.5.12, 2026.5.12

Weakness (CWE)

CWE	Source	Description
CWE-184	cna	Incomplete List of Disallowed Inputs

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.8	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

GitHub Security Advisory (GHSA-j472-gf56-x589) https://github.com/openclaw/openclaw/security/advisories/GHSA-j472-gf56-x589
VulnCheck Advisory: OpenClaw < 2026.5.12 - Allowlist Bypass via PowerShell Encoded-Command Aliases https://www.vulncheck.com/advisories/openclaw-allowlist-bypass-via-powershell-encoded-command-aliases