Vulnerability in Nodejs (CVE-2026-21714, CVSS 5.3)

Summary

Vulnerability in Nodejs (CVE-2026-21714). Risk of unauthorized operations or information disclosure.

Original description

The description as published by the source.

A memory leak occurs in Node.js HTTP/2 servers when a client sends WINDOW_UPDATE frames on stream 0 (connection-level) that cause the flow control window to exceed the maximum value of 2³¹-1. The server correctly sends a GOAWAY frame, but the Http2Session object is never cleaned up.

This vulnerability affects HTTP2 users on Node.js 20, 22, 24 and 25.

Source: NIST National Vulnerability Database NVD

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-21714 has been found in Nodejs.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Nodejs CVE-2026-21714" on the vendor's site.

CVE-2026-21714 (Nodejs) — CWE-401 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-401) exists in Nodejs.

📍 Affected scope

Check the vendor advisory for the affected versions of Nodejs.

🔥 Severity

Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Nodejs' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'Nodejs' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で Nodejs を grep し、稼働しているサービス・バージョンを把握する。
2
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Bitnami node

[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"20.20.2"},{"introduced":"21.0.0"},{"fixed":"22.22.2"},{"introduced":"23.0.0"},{"fixed":"24.14.1"},{"introduced":"25.0.0"},{"fixed":"25.8.2"}]}]

Bitnami node-min

[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"20.20.2"},{"introduced":"21.0.0"},{"fixed":"22.22.2"},{"introduced":"23.0.0"},{"fixed":"24.14.1"},{"introduced":"25.0.0"},{"fixed":"25.8.2"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Alpine Linux ALPINE-CVE-2026-21714 nodejs Fixed in: 22.22.2-r0
Debian DEBIAN-CVE-2026-21714 nodejs Fixed in: 12.22.12~dfsg-1~deb11u8
Ubuntu UBUNTU-CVE-2026-21714 nodejs

References

advisory nodejs.org
web nvd.nist.gov