CVE-2026-27190: deno OS Command Injection

Vulnerability summary

CVE-2026-27190 is a critical (CVSS 9.8) OS Command Injection vulnerability in deno. EPSS estimates a 3.54% chance of exploitation in the next 30 days, higher than 89.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 20-02-2026
   PublishedVulnerability first disclosed.
2. 24-02-2026
   Last modifiedVulnerability information updated.

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.6.8, a command injection vulnerability exists in Deno's node:child_process implementation. This vulnerability is fixed in 2.6.8.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.