Cipher Vulnerability in Deno Runtime Affects Multiple Versions
CVE-2026-22863

9.2CRITICAL

Key Information:

Vendor

Denoland

Status
Deno
Vendor
CVE Published:
15 January 2026

What is CVE-2026-22863?

The Deno runtime, which supports JavaScript, TypeScript, and WebAssembly, is susceptible to a vulnerability in its node:crypto module prior to version 2.6.0. This flaw allows an attacker to execute an infinite number of encryptions, creating opportunities for brute force attacks and advanced techniques aimed at uncovering sensitive server information. The issue has been remedied in version 2.6.0, highlighting the importance of updating to secure server applications.

Affected Version(s)

deno < 2.6.0

References

https://github.com/denoland/deno/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/denoland/deno/releases/tag/v2.6.0
x_refsource_MISC

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.