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CVE

CVE-2026-31995

OpenClaw has Windows Lobster shell fallback command injection in constrained fallback path
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CVE

CVE-2026-31995

OpenClaw has Windows Lobster shell fallback command injection in constrained fallback path

Summary

On Windows, the Lobster extension previously retried certain spawn failures (ENOENT/EINVAL) with shell: true for wrapper compatibility. In that fallback path, tool-provided arguments could be interpreted by cmd.exe if fallback was triggered.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Latest published version at triage: 2026.2.17
  • Affected range: >= 2026.1.21 <= 2026.2.17
  • Patched version: 2026.2.19 (pre-set for next release)

Fix

The Windows shell fallback was removed. Wrapper compatibility is preserved by resolving .cmd/.bat shims to a concrete Node entrypoint (or executable) and executing with explicit argv (no shell). If a safe entrypoint cannot be resolved, execution now fails closed with a guided error.

Fix Commit(s)

  • ba7be018da354ea9f803ed356d20464df0437916

Severity Context

This issue requires Windows plus fallback-triggering conditions, and argument control through a local operator-defined workflow. 

OpenClaw thanks @tdjackey for reporting.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
5.8
-
4.0
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-fg3m-vhrr-8gj6, https://nvd.nist.gov/vuln/detail/CVE-2026-31995, https://github.com/openclaw/openclaw/commit/ba7be018da354ea9f803ed356d20464df0437916, https://github.com/openclaw/openclaw, https://www.vulncheck.com/advisories/openclaw-command-injection-via-windows-shell-fallback-in-lobster-extension

Severity

7

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7
EPSS Probability
0.00045%
EPSS Percentile
0.14038%
Introduced Version
2026.1.21
Fix Available
2026.2.19

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