Vulnerability Database

328,409

Total vulnerabilities in the database

OpenClaw's shell env fallback trusts unvalidated SHELL path from host environment

The shell environment fallback path could invoke an attacker-controlled shell when SHELL was inherited from an untrusted host environment. In affected builds, shell-env loading used $SHELL -l -c 'env -0' without validating that SHELL points to a trusted executable.

In threat-model terms, this requires local environment compromise or untrusted startup environment injection first; it is not a remote pre-auth path. The hardening patch validates SHELL as an absolute normalized executable, prefers /etc/shells, applies trusted-prefix fallback checks, and falls back safely to /bin/sh when validation fails. The dangerous env-var policy now also blocks SHELL overrides.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected versions: <= 2026.2.21-2
  • Latest published vulnerable version: 2026.2.21-2
  • Patched versions (planned next release): >= 2026.2.22

Fix Commit(s)

  • 25e89cc86338ef475d26be043aa541dfdb95e52a

Release Process Note

The advisory pre-sets patched_versions to the planned next release (2026.2.22). After that npm release is published, maintainers can publish this advisory without further version-field edits.

OpenClaw thanks @athuljayaram for reporting.

CVSS v3:

  • Severity: Unknown
  • Score:
  • AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

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