RCE in Denoland Deno
CVE-2026-103473
Deno versions 2.7.0 through 2.9.7 on Windows contain a command injection vulnerability in node:child_process where shell arguments are escaped for the wrong shell type. Attackers can inject OS commands by passing untrusted arguments with the shell option, allowing arbitrary command execution with Deno process privileges.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/denoland/deno/pull/36772 (issue-tracking, patch)
- github.com/denoland/deno (product)
- github.com/denoland/deno/blob/0c071246a412575e07423263404a5d13e7ed6aa2/ext/node… (technical-description)
- github.com/denoland/deno/blob/0c071246a412575e07423263404a5d13e7ed6aa2/ext/node… (technical-description)
- www.vulncheck.com/advisories/deno-2.7.0-through-2.9.7-command-injection-via-nod… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103473?
- CVE-2026-103473 is a high-severity vulnerability in Denoland Deno, classified under OS Command Injection. CVSS score: 8.1/10. Published 2026-09-30.
- How severe is CVE-2026-103473?
- High severity. CVSS v3 base score is 8.1 out of 10.