Vulnerability · Published Jan 15, 2026 · Assigned by GitHub_M
CVE-2026-22863Deno node:crypto doesn't finalize cipher
Critical 9.2
In plain English
A critical-severity security flaw in deno from denoland. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 4.0)9.2Critical
Exploit odds (30 days)0.2%top 89.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-325 · 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
References
- https://github.com/denoland/deno/security/advisories/GHSA-5379-f5hf-w38v x_refsource_CONFIRM
- https://github.com/denoland/deno/releases/tag/v2.6.0 x_refsource_MISC