CVE-2026-53855 | OpenClaw before 2026.4.2 contains an inline-eval bypass vuln… | CVSS 8.1 HIGH

Description

OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weaken strict allowlist checks via shell positional parameters. Attackers can combine allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules, enabling execution of unapproved shell-provided content.

Metadata

CVE ID: CVE-2026-53855
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-10 21:21 UTC
Published: 2026-06-16 18:05 UTC
Last updated: 2026-06-17 13:53 UTC
Primary CWE: CWE-184
Incomplete List of Disallowed Inputs
Vendor / Product: OpenClaw / OpenClaw
Sources: cve.org · NVD

Severity & Metrics

8.1 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
OpenClaw	OpenClaw	—	0 < 2026.4.2, 2026.4.2

Weakness (CWE)

CWE	Source	Description
CWE-184	cna	Incomplete List of Disallowed Inputs
CWE-863	cna	Incorrect Authorization

CVSS scores (2)

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

References (2)

GitHub Security Advisory (GHSA-5cj2-3jr2-5h77) https://github.com/openclaw/openclaw/security/advisories/GHSA-5cj2-3jr2-5h77
VulnCheck Advisory: OpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks https://www.vulncheck.com/advisories/openclaw-shell-positional-parameters-bypass-in-inline-eval-checks