What is CVE-2026-22863?

CVE-2026-22863 is a high-severity vulnerability in Deno, classified under Missing Cryptographic Step. CVSS score: 7.5/10. Published 2026-01-15.

How severe is CVE-2026-22863?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Deno

CVE-2026-22863

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 m…

EPSS: 0.002 (9.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Deno
Denoland Deno — versions < 2.6.0

Weakness classification (CWE)

CWE-325 — Missing Cryptographic Step

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-22863?: CVE-2026-22863 is a high-severity vulnerability in Deno, classified under Missing Cryptographic Step. CVSS score: 7.5/10. Published 2026-01-15.
How severe is CVE-2026-22863?: High severity. CVSS v3 base score is 7.5 out of 10.