CVE-2026-22863 CRITICAL

CVE-2026-22863: Deno node:crypto doesn't finalize cipher

Vendor Denoland
Product deno
Weakness CWE-325
Published January 15, 2026
Last update January 16, 2026
View on NVD All CVEs

CVSS base score

9.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

What the vulnerability does

01Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.6.0, node:crypto doesn't finalize cipher. The vulnerability allows an attacker to have infinite encryptions. This can lead to naive attempts at brute forcing, as well as more refined attacks with the goal to learn the server secrets. This vulnerability is fixed in 2.6.0.

Key dates

02Disclosure timeline

January 15, 2026 CVE published
January 16, 2026 Record updated