Creation of chroot Jail Without Changing Working Directory in Node.js - CVE-2026-21717

Vulnerability identifier: #VU124547

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-2026-21717

CWE-ID: CWE-243

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to predictable hash collisions in V8's string hashing mechanism when processing integer-like strings. A remote attacker can craft input with many colliding keys, degrading performance during JSON.parse() or other operations that internalize strings.

The most common trigger is endpoints parsing attacker-controlled JSON, leading to significant CPU and memory usage.

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 x86_64
Red Hat Enterprise Linux for ARM 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-docs
nodejs-libs
nodejs
nodejs-debuginfo
nodejs-debugsource
nodejs-devel
nodejs-full-i18n
nodejs (Debian package)
nodejs20
nodejs20-docs
nodejs20-debuginfo
nodejs20-devel
corepack20
nodejs20-debugsource
npm20
nodejs22
nodejs22-docs
nodejs22-debuginfo
nodejs22-devel
corepack22
npm22
nodejs22-debugsource
nodejs24 (Red Hat package)
nodejs24-devel
npm24
nodejs24-debuginfo
nodejs24
nodejs24-debugsource
nodejs24-docs

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 - update to 10.8.2-1.20.18.2.7
v8-devel - update to 11.3.244.8-1.20.18.2.7
nodejs-docs - update to 20.18.2-7
nodejs-libs - update to 20.18.2-7
nodejs - update to 20.18.2-7
nodejs-debuginfo - update to 20.18.2-7
nodejs-debugsource - update to 20.18.2-7
nodejs-devel - update to 20.18.2-7
nodejs-full-i18n - update to 20.18.2-7
nodejs (Debian package) - update to 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
nodejs20-debuginfo - 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
corepack20 - 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
nodejs20-debugsource - 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
nodejs22 - addressed in versions 22.22.2-2.fc43, 22.22.2-3.fc42, 22.22.2-3.fc44
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
nodejs22-devel - 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 - 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-debugsource - 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-devel - update to 24.14.1-150700.15.8.1
npm24 - update to 24.14.1-150700.15.8.1
nodejs24-debuginfo - update to 24.14.1-150700.15.8.1
nodejs24 - update to 24.14.1-150700.15.8.1
nodejs24-debugsource - update to 24.14.1-150700.15.8.1
nodejs24-docs - 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
• Multiple vulnerabilities in IBM Business Automation Workflow