What is CVE-2026-22864?

CVE-2026-22864 is a high-severity vulnerability in Denoland Deno, classified under Command Injection. CVSS score: 8.1/10. Published 2026-01-15.

How severe is CVE-2026-22864?

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

RCE in Denoland Deno

CVE-2026-22864

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.5.6, a prior patch aimed to block spawning Windows batch/shell files by returning an error when a spawned path’s extension matched .bat or .cmd. That check performs a case…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (11.0th 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 < 2.5.6

Weakness classification (CWE)

CWE-77 — Command Injection

References

https://github.com/denoland/deno/security/advisories/GHSA-m3c4-prhw-mrx6 (x_refsource_CONFIRM)
https://github.com/denoland/deno/releases/tag/v2.5.6 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-22864?: CVE-2026-22864 is a high-severity vulnerability in Denoland Deno, classified under Command Injection. CVSS score: 8.1/10. Published 2026-01-15.
How severe is CVE-2026-22864?: High severity. CVSS v3 base score is 8.1 out of 10.