9.2

CVE-2026-22863: deno Missing Cryptographic Step

CVSS: 9.2v4.0CriticalAnalyzed
AliasesGHSA-5379-f5hf-w38v
Published 15-01-2026Last modified 16-01-2026
Open JSON

Vulnerability summary

CVE-2026-22863 is a critical (CVSS 9.2) Missing Cryptographic Step vulnerability in deno. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.2/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 15-01-2026
    PublishedVulnerability first disclosed.
  2. 16-01-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Deno

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Crates.Io1 product
  • deno< 2.6.0
Deno1 product
Denoland1 product

3 vendors · 3 products

References

4 links