Reachable Assertion Affecting nodejs25 package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.46% (41st percentile)

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  • Snyk IDSNYK-RHEL10-NODEJS25-22438157
  • published12 Nov 2026
  • disclosed11 Nov 2026

Introduced: 11 Nov 2026

NewCVE-2026-123863  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 nodejs25.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs25 package and not the nodejs25 package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

A reachable assertion in Node.js HTTP/2 session teardown lets any unauthenticated client abort the server, over both TLS and cleartext. A client can arrange for an Http2Stream that still holds nghttp2-allocated header buffers to outlive its session: the stream is removed from the session's stream set but never detached, so when ~Http2Session() runs the memory accounting is nonzero and the CHECK_EQ(current_nghttp2_memory_, 0) assertion fails, terminating the process. The trigger needs only a default http2 server whose handler responds before the request body has ended, which is typical. It is a variant of CVE-2024-27983 that the earlier fix did not cover, because that fix only detached streams still tracked in the session. This vulnerability affects Node.js 26.x (since 26.9.0) and 24.x (since 24.22.0).

CVSS Base Scores

version 3.1