Vulnerability · Published Jun 16, 2026 · Assigned by VulnCheck

CVE-2026-53855OpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks

High 8.1

In plain English

A high-severity incorrect authorization in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.3%top 82.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	openclaw	2026.4.2	GHSA-5cj2-3jr2-5h77

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	OpenClaw	0 – before 2026.4.2

Weakness: CWE-184, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-5cj2-3jr2-5h77) vendor-advisory
VulnCheck Advisory: OpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks third-party-advisory