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Vulnerabilities

Vulnerability · CVE-2026-123875

A NULL pointer dereference in Node.js HTTP/2 lets an unauthenticated client crash the server, over both TLS and cleartext, by cancelling file downloads.

Published Nov 11, 2026 · catalog updated Nov 12, 2026 · Red Hat Red Hat Enterprise Linux

Last checked Nov 12, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for CVE-2026-123875. A missing EPSS score is not a low risk. Compare Red Hat Red Hat Enterprise Linux with the linked advisory before you change production.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.

Same product and reporting

Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Not in the current FIRST EPSS dataset
Remediation
Advisory link
Affected products
Alpine:v3.21 nodejs · Alpine:v3.22 nodejs · Alpine:v3.23 nodejs · Alpine:v3.24 nodejs · Debian:12 nodejs · Debian:13 nodejs

A NULL pointer dereference in Node.js HTTP/2 lets an unauthenticated client crash the server, over both TLS and cleartext, by cancelling file downloads. When the server serves a file with stream.respondWithFile() or stream.respondWithFD() and the client cancels the request, a StreamPipe used for the transfer is torn down in an order that leaves a NULL pointer which is then dereferenced, aborting the process. No crafted frames are needed, and a handful of cancelled requests against a default file-serving handler is enough. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Alpine:v3.21 nodejs0 → 22.23.5-r0
  • Alpine:v3.22 nodejs0 → 22.23.5-r0
  • Alpine:v3.23 nodejs0 → 24.22.3-r0
  • Alpine:v3.24 nodejs0 → 24.22.3-r0
  • Debian:12 nodejs18.13.0+dfsg1-1, 18.13.0+dfsg1-1.1, 18.19.0+dfsg-1
  • Debian:13 nodejs20.19.2+dfsg-1, 20.19.2+dfsg-1+deb13u1, 20.19.2+dfsg-1+deb13u2
  • Debian:14 nodejs20.19.2+dfsg-1, 20.19.4+dfsg-1, 20.19.5+dfsg+~cs20.19.12-1

How to fix CVE-2026-123875

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2026-123875. A missing EPSS score is not a low risk. Compare Red Hat Red Hat Enterprise Linux with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 22.23.5-r0, 0 → 24.22.3-r0, 18.13.0+dfsg1-1, 18.13.0+dfsg1-1.1, 18.19.0+dfsg-1, 20.19.2+dfsg-1, 20.19.2+dfsg-1+deb13u1, 20.19.2+dfsg-1+deb13u2, 20.19.2+dfsg-1, 20.19.4+dfsg-1, 20.19.5+dfsg+~cs20.19.12-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-476: NULL Pointer Dereference. EPSS is absent from the current FIRST dataset. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 11, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    A NULL pointer dereference in Node.js HTTP/2 lets an unauthenticated client crash the server, over both TLS and cleartext, by cancelling file downloads. When the server serves a file with stream.respondWithFile() or stream.respondWithFD() and the client cancels the request, a StreamPipe used for the transfer is torn down in an order that leaves a NULL pointer which is then dereferenced, aborting t

  2. Nov 12, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    A NULL pointer dereference in Node.js HTTP/2 lets an unauthenticated client crash the server, over both TLS and cleartext, by cancelling file downloads. When the server serves a file with stream.respondWithFile() or stream.respondWithFD() and the client cancels the request, a StreamPipe used for the transfer is torn down in an order that leaves a NULL pointer which is then dereferenced, aborting t

  3. Nov 12, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    nodejs fixed in 22.23.5-r0; nodejs fixed in 22.23.5-r0; nodejs fixed in 24.22.3-r0; nodejs fixed in 24.22.3-r0

  4. Nov 12, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    nodejs fixed in 22.23.5-r0

  5. Nov 12, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    nodejs fixed in 24.22.3-r0

  6. Nov 12, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    A NULL pointer dereference in Node.js HTTP/2 lets an unauthenticated client crash the server, over both TLS and cleartext, by cancelling file downloads. When the server serves a file with stream.respondWithFile() or stream.respondWithFD() and the client cancels the request, a StreamPipe used for the transfer is torn down in an order that leaves a NULL pointer which is then dereferenced, aborting t

Sources

References

Freshness

Last verified in this catalog Nov 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Trivy Vulnerability DBNov 12, 2026
  • Red Hat Security DataNov 12, 2026
  • OpenSSF OSV / OSV ScannerNov 12, 2026
  • OpenSSF OSV / OSV ScannerNov 12, 2026