CVE-2026-22863

Deno node:crypto doesn't finalize cipher

State: Published
Severity: 9.2 Critical
Published: Jan 15, 2026
Updated: Jan 16, 2026
Reserved: Jan 12, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.2 Critical	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	GitHub_M

Weaknesses

CWE-325 Missing Cryptographic Step

Affected Products

Product	Versions
denodenoland	< 2.6.0Affected

References

https://github.com/denoland/deno/security/advisories/GHSA-5379-f5hf-w38v
https://github.com/denoland/deno/releases/tag/v2.6.0

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