SB20260423130 - OS Command Injection in Deno

Description

This security bulletin contains information about 1 vulnerability.

1) OS Command Injection (CVE-ID: CVE-2026-32260)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS 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 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.

Remediation

Install update from vendor's website.

References

• https://github.com/denoland/deno/security/advisories/GHSA-4c96-w8v2-p28j
• https://github.com/advisories/GHSA-4c96-w8v2-p28j