CVE WatchJul 15, 2026

CVE-2025-59465

A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unhandled `TLSSocket` er

CVSS

7.5

High

EPSS

3.8%

p89

KEV

—

Exploit Today

0-100

Published: Jan 20, 2026 · Last modified: Jul 15, 2026 · CWE-400 · CWE-248

EPSS · 30d

3.8%EPSS · 30 days3.8%

2026-06-302026-07-16

Technical description

A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unhandled `TLSSocket` error `ECONNRESET`. Instead of safely closing the connection, the process crashes, enabling a remote denial of service. This primarily affects applications that do not attach explicit error handlers to secure sockets, for example: ``` server.on('secureConnection', socket => { socket.on('error', err => { console.log(err) }) }) ```

Official references

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