What is CVE-2026-27190?

CVE-2026-27190 is a high-severity vulnerability in Denoland Deno, classified under OS Command Injection. CVSS score: 8.1/10. Published 2026-02-20.

How severe is CVE-2026-27190?

High severity. CVSS v3 base score is 8.1 out of 10.

RCE in Denoland Deno

CVE-2026-27190

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.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.009 (76.1th percentile) — read the EPSS interpretation.

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.

Affected products

Denoland Deno — versions < 2.6.8

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

https://github.com/denoland/deno/security/advisories/GHSA-hmh4-3xvx-q5hr (x_refsource_CONFIRM)
https://github.com/denoland/deno/commit/9132ad958c83a0d0b199de12b69b877f63edab4c (x_refsource_MISC)
https://github.com/denoland/deno/releases/tag/v2.6.8 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27190?: CVE-2026-27190 is a high-severity vulnerability in Denoland Deno, classified under OS Command Injection. CVSS score: 8.1/10. Published 2026-02-20.
How severe is CVE-2026-27190?: High severity. CVSS v3 base score is 8.1 out of 10.