CVE-2026-49402

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.10, Deno's node:child_process implementation provided an escapeShellArg() helper used when callers passed shell: true to spawn / spawnSync / exec and friends. On Windows, the helper failed to quote arguments that contained cmd.exe metacharacters and did not neutralize % (which cmd.exe expands even inside double-quoted strings). An attacker who controlled any portion of an argument passed to such a call could inject arbitrary additional commands into the spawned cmd.exe invocation. This vulnerability is fixed in 2.7.10.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/denoland/deno/security/advisories/GHSA-7xh3-mhg9-jcw8	Exploit Mitigation Vendor Advisory
https://github.com/denoland/deno/security/advisories/GHSA-7xh3-mhg9-jcw8	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

History

26 Jun 2026, 17:33

Type	Values Removed	Values Added
CPE		cpe:2.3:o:microsoft:windows:-:::::::* cpe:2.3:a:deno:deno::::::::
References	~~() https://github.com/denoland/deno/security/advisories/GHSA-7xh3-mhg9-jcw8 -~~	() https://github.com/denoland/deno/security/advisories/GHSA-7xh3-mhg9-jcw8 - Exploit, Mitigation, Vendor Advisory
First Time		Deno Microsoft windows Microsoft Deno deno

23 Jun 2026, 18:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-23 18:18

Updated : 2026-06-26 17:33

NVD link : CVE-2026-49402

Mitre link : CVE-2026-49402

CVE.ORG link : CVE-2026-49402

JSON object : View

Products Affected

deno

deno

microsoft

windows

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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