onyx

onyx --cves cve-2026-21637

CVE-2026-21637

HIGHNode.js
score
<0.1
cvss
7.5
epss
1.1%
published
2026-01-20
kev added
—
first seen

Node.js contains a denial of service caused by unhandled synchronous exceptions in pskCallback or ALPNCallback during TLS handshake, letting remote attackers crash or exhaust server resources, exploit requires attacker to trigger TLS handshake with crafted input.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2026-01-20 — PublishedP2026-10-21 — Tracked by OnyxTscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 1.1%2026-09-23: epss 1.1%2026-09-24: epss 1.1%2026-09-25: epss 1.1%2026-09-26: epss 1.1%2026-09-27: epss 1.1%2026-09-29: epss 1.1%2026-09-30: epss 1.1%2026-10-01: epss 1.1%2026-10-02: epss 1.1%2026-10-03: epss 1.1%2026-10-04: epss 1.1%2026-10-05: epss 1.1%2026-10-06: epss 1.1%2026-10-07: epss 1.1%2026-10-08: epss 1.1%2026-10-09: epss 1.1%2026-10-10: epss 1.1%2026-10-11: epss 1.1%2026-10-12: epss 1.1%2026-10-13: epss 1.1%2026-10-14: epss 1.1%2026-10-15: epss 1.1%2026-10-16: epss 1.1%2026-10-18: epss 1.1%2026-10-19: epss 1.1%2026-10-20: epss 1.1%2026-10-21: epss 1.1%1.1%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx

Weaknesses

CWE-400

References 1