CVE-2026-21637

Public on 2026-01-15

Modified on 2026-01-15

Description

TLS PSK/ALPN Callback Exceptions Bypass Error Handlers, Causing DoS and FD Leak

NOTE: https://nodejs.org/en/blog/vulnerability/december-2025-security-releases#tls-pskalpn-callback-exceptions-bypass-error-handlers-causing-dos-and-fd-leak-cve-2026-21637---medium

Severity

Medium

See what this means

CVSS v3 Base Score

4.3

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2023	nodejs	No Fix Planned
Amazon Linux 2023	nodejs20	Pending Fix
Amazon Linux 2023	nodejs22	Pending Fix
Amazon Linux 2023	nodejs24	Pending Fix

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-21637 Mitre: CVE-2026-21637