OS Command Injection in Deno - CVE-2026-32260
Published: April 23, 2026
Vulnerability identifier: #VU127067
CSH Severity: High
CVSS v4.0: 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
CVE-ID: CVE-2026-32260
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Deno Land
Affected software:
Deno
Deno
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary OS commands.
The vulnerability exists due to improper neutralization of special elements used in an OS command in the node:child_process polyfill when handling user-controlled arguments passed to spawn or spawnSync with shell: true. A remote attacker can supply crafted arguments containing shell metacharacters to execute arbitrary OS commands.
Exploitation bypasses Deno's permission system and requires the application to invoke the vulnerable functionality with shell: true.
How to mitigate CVE-2026-32260
Install security update from vendor's website.