SB20260423128 - Command injection in Deno

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Main Vulnerability Database SB20260423128

SB20260423128 - Command injection in Deno

Published: April 23, 2026

Security Bulletin ID SB20260423128
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Command injection (CVE-ID: CVE-2026-22864)

CWE-ID: CWE-77 - Command injection

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to execute arbitrary commands.

The vulnerability exists due to improper neutralization of special elements used in a command in the Deno.Command spawn path on Windows when checking spawned file extensions for batch or shell files. A remote attacker can supply a specially crafted batch or command file path with alternate extension casing and user-controlled arguments to execute arbitrary commands.

The issue affects Windows because the extension check can be bypassed with case-insensitive variants such as .BAT or .Bat.


Remediation

Install update from vendor's website.

References