What is CVE-2026-49402?

CVE-2026-49402 is a high-severity vulnerability in Denoland Deno, classified under OS Command Injection. CVSS score: 8.1/10. Published 2026-06-23.

How severe is CVE-2026-49402?

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

RCE in Denoland Deno

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 Windo…

Vulnerability class: Command Injection (OS Command Injection)

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 < 2.7.10

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-49402?: CVE-2026-49402 is a high-severity vulnerability in Denoland Deno, classified under OS Command Injection. CVSS score: 8.1/10. Published 2026-06-23.
How severe is CVE-2026-49402?: High severity. CVSS v3 base score is 8.1 out of 10.