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CVE-2026-32260

Command Injection via incomplete shell metacharacter blocklist in node:child_process (bypass of CVE-2026-27190 fix)

Published: Mar 12, 2026Updated: Mar 18, 2026 Sources: CVE List NVD GHSACWE-78
NVD MITRE
8.1CVSSHIGH
EPSS Score
1.5%
Top 29.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. From 2.7.0 to 2.7.1, A command injection vulnerability exists in Deno's node:child_process polyfill (shell: true mode) that bypasses the fix for CVE-2026-27190. The two-stage argument sanitization in transformDenoShellCommand (ext/node/polyfills/internal/child_process.ts) has a priority bug: when an argument contains a $VAR pattern, it is wrapped in double quotes (L1290) instead of single quotes. Double quotes in POSIX sh do not suppress backtick command substitution, allowing injected commands to execute. An attacker who controls arguments passed to spawnSync or spawn with shell: true can execute arbitrary OS commands, bypassing Deno's permission system. This vulnerability is fixed in 2.7.2.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-78

Affected Products

denodenoland
On-prem
OSS Libraries / generic-library
denodeno
Library
OSS Libraries / generic-library
denocrates.ioOSS Libraries
denolandoss-projectUSOSS Librariesaka deno
denooss-projectOSS Librariesaka deno runtime, deno standard modules
crates.iopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://github.com/denoland/deno/security/advisories/GHSA-4c96-w8v2-p28j
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-32260
nvd.nist.gov
https://github.com/denoland/deno
github.com

Timeline

Published
Mar 12, 2026
Last Updated
Mar 18, 2026

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