Missing release of memory after effective lifetime in Node.js - CVE-2026-21714

Vulnerability identifier: #VU124546

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-21714

CWE-ID: CWE-401

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause resource exhaustion.

The vulnerability exists due to a memory leak in the HTTP/2 server implementation when processing WINDOW_UPDATE frames on stream 0. A remote attacker can send WINDOW_UPDATE frames that exceed the maximum flow control window, causing the Http2Session object to remain allocated despite sending a GOAWAY frame.

The server fails to clean up the Http2Session object after connection termination, leading to unbounded memory consumption.

Node.js
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Web and Scripting Module
openSUSE Leap
openEuler
Fedora
IBM Business Automation Workflow
npm
v8-devel
nodejs-debugsource
nodejs-debuginfo
nodejs
nodejs-docs
nodejs-libs
nodejs-full-i18n
nodejs-devel
nodejs (Debian package)
nodejs20
nodejs20-docs
npm20
nodejs20-debugsource
corepack20
nodejs20-devel
nodejs20-debuginfo
nodejs22
nodejs22-debugsource
nodejs22-devel
npm22
corepack22
nodejs22-docs
nodejs22-debuginfo
nodejs24 (Red Hat package)
nodejs24-docs
nodejs24-devel
nodejs24-debugsource
nodejs24
nodejs24-debuginfo
npm24

Install security update from vendor's website.

Node.js - addressed in versions 20.20.2, 22.22.2, 24.14.1, 25.8.2
IBM Business Automation Workflow - addressed in versions 24.0.0-IF009, 24.0.1-IF008, 25.0.0-IF005, 26.0.0.0
npm - addressed in versions 6.14.16-1.12.22.11.11, 6.14.16-1.12.22.11.13, 10.8.2-1.20.18.2.7
v8-devel - addressed in versions 7.8.279.23-1.12.22.11.11, 7.8.279.23-1.12.22.11.13, 11.3.244.8-1.20.18.2.7
nodejs-debugsource - addressed in versions 12.22.11-11, 12.22.11-13, 20.18.2-7
nodejs-debuginfo - addressed in versions 12.22.11-11, 12.22.11-13, 20.18.2-7
nodejs - addressed in versions 12.22.11-11, 12.22.11-13, 20.18.2-7
nodejs-docs - addressed in versions 12.22.11-11, 12.22.11-13, 20.18.2-7
nodejs-libs - addressed in versions 12.22.11-11, 12.22.11-13, 20.18.2-7
nodejs-full-i18n - addressed in versions 12.22.11-11, 12.22.11-13, 20.18.2-7
nodejs-devel - addressed in versions 12.22.11-11, 12.22.11-13, 20.18.2-7
nodejs (Debian package) - addressed in versions 18.20.4+dfsg-1~deb12u2, 20.19.2+dfsg-1+deb13u2
nodejs20 - addressed in versions 20.20.2-3.fc43, 20.20.2-3.fc44, 20.20.2-4.fc42
nodejs20-docs - addressed in versions 20.20.2-150500.11.27.1, 20.20.2-150600.3.18.1
npm20 - addressed in versions 20.20.2-150500.11.27.1, 20.20.2-150600.3.18.1
nodejs20-debugsource - addressed in versions 20.20.2-150500.11.27.1, 20.20.2-150600.3.18.1
nodejs20 - addressed in versions 20.20.2-150500.11.27.1, 20.20.2-150600.3.18.1
corepack20 - addressed in versions 20.20.2-150500.11.27.1, 20.20.2-150600.3.18.1
nodejs20-devel - addressed in versions 20.20.2-150500.11.27.1, 20.20.2-150600.3.18.1
nodejs20-debuginfo - addressed in versions 20.20.2-150500.11.27.1, 20.20.2-150600.3.18.1
nodejs22 - addressed in versions 22.22.2-2.fc43, 22.22.2-3.fc42, 22.22.2-3.fc44
nodejs22-debugsource - addressed in versions 22.22.2-150600.13.15.1, 22.22.2-150700.3.9.1
nodejs22-devel - addressed in versions 22.22.2-150600.13.15.1, 22.22.2-150700.3.9.1
npm22 - addressed in versions 22.22.2-150600.13.15.1, 22.22.2-150700.3.9.1
nodejs22 - addressed in versions 22.22.2-150600.13.15.1, 22.22.2-150700.3.9.1
corepack22 - update to 22.22.2-150600.13.15.1
nodejs22-docs - addressed in versions 22.22.2-150600.13.15.1, 22.22.2-150700.3.9.1
nodejs22-debuginfo - addressed in versions 22.22.2-150600.13.15.1, 22.22.2-150700.3.9.1
nodejs24 (Red Hat package) - update to 24.14.1-2.el10_1
nodejs24-docs - update to 24.14.1-150700.15.8.1
nodejs24-devel - update to 24.14.1-150700.15.8.1
nodejs24-debugsource - update to 24.14.1-150700.15.8.1
nodejs24 - update to 24.14.1-150700.15.8.1
nodejs24-debuginfo - update to 24.14.1-150700.15.8.1
npm24 - update to 24.14.1-150700.15.8.1

• https://nodejs.org/en/blog/vulnerability/march-2026-security-releases

• Multiple vulnerabilities in Node.js
• Debian update for nodejs
• SUSE update for nodejs20
• SUSE update for nodejs20
• SUSE update for nodejs24
• openEuler 24.03 LTS SP1 update for nodejs
• openEuler 24.03 LTS update for nodejs
• openEuler 24.03 LTS SP3 update for nodejs
• openEuler 24.03 LTS SP2 update for nodejs
• SUSE update for nodejs22
• SUSE update for nodejs22
• Fedora 44 update for nodejs20
• Fedora 43 update for nodejs20
• Red Hat Enterprise Linux 9 update for the nodejs:24 module
• Red Hat Enterprise Linux 10 update for nodejs24
• Fedora 44 update for nodejs22
• Fedora 43 update for nodejs22
• Fedora 42 update for nodejs20
• Fedora 42 update for nodejs22
• Debian update for nodejs
• openEuler 22.03 LTS SP4 update for nodejs
• openEuler 20.03 LTS SP4 update for nodejs
• Multiple vulnerabilities in IBM Business Automation Workflow