High severity · published Sep 30, 2026
CVE-2026-103473
Deno 2.7.0 through 2.9.7 Command Injection via node:child_process
8.1
CVSS
1.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
deno · denoland
2.7.0 through 2.9.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103473
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103473
issue-tracking
https://github.com/denoland/deno/pull/36772
product
https://github.com/denoland/deno
technical-description
https://github.com/denoland/deno/blob/0c071246a412575e07423263404a5d13e7ed6aa2/ext/node/polyfills/internal/child_process.ts#L1499
technical-description
https://github.com/denoland/deno/blob/0c071246a412575e07423263404a5d13e7ed6aa2/ext/node/polyfills/internal/child_process.ts#L1339
third-party-advisory
https://www.vulncheck.com/advisories/deno-2.7.0-through-2.9.7-command-injection-via-node-child-process
More from deno
9.8
CVE-2026-32260
Command Injection via incomplete shell metacharacter blocklist in node:child_process (bypass of CVE-2026-27190 fix)
9.8
CVE-2026-27190
Deno has a Command Injection via Incomplete shell metacharacter blocklist in node:child_process
9.8
CVE-2026-22864
Deno has an incomplete fix for command-injection prevention on Windows — case-insensitive extension bypass
9.8
CVE-2023-33966
Deno missing "--allow-net" permission check for built-in Node modules
9.8
CVE-2023-28445
Deno improperly handles resizable ArrayBuffer