Inefficient Algorithmic Complexity in brace-expansion - CVE-2026-13149

Vulnerability identifier: #VU135820

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-13149

CWE-ID: CWE-407

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 inefficient algorithmic complexity in expand() when processing attacker-influenced brace expansion patterns containing consecutive non-expanding {} groups. A remote attacker can send a specially crafted input string to cause a denial of service.

The issue can block the calling thread for minutes or indefinitely with a small all-ASCII input, and applications using Node's single-threaded event loop may fully stall a worker or process.

brace-expansion
Maximo Application Suite - Visual Inspection Component
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
nodejs-nodemon (Red Hat package)
nodejs22 (Red Hat package)
nodejs24 (Red Hat package)
Red Hat Advanced Cluster Security for Kubernetes
Red Hat OpenShift Container Platform

Install security update from vendor's website.

brace-expansion - update to 5.0.7
Maximo Application Suite - Visual Inspection Component - addressed in versions 9.1.19, 9.2.1
nodejs-nodemon (Red Hat package) - addressed in versions 3.1.14-2.el10_0, 3.1.14-2.el10_2
Red Hat Advanced Cluster Security for Kubernetes - update to 4.11.2
Red Hat OpenShift Container Platform - addressed in versions 4.18.52, 4.19.42, 4.20.31, 4.21.26
nodejs22 (Red Hat package) - addressed in versions 22.23.1-3.el10_0, 22.23.1-4.el10_2
nodejs24 (Red Hat package) - update to 24.18.0-3.el10_2

• https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-3jxr-9vmj-r5cp

• Inefficient Algorithmic Complexity in brace-expansion
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.21
• Inefficient Algorithmic Complexity in Red Hat OpenShift Container Platform 4.20
• Red Hat Enterprise Linux 8 update for the nodejs:24 module
• Red Hat Enterprise Linux 10 update for nodejs-nodemon
• Red Hat Enterprise Linux 10 update for nodejs22
• Red Hat Enterprise Linux 10 update for nodejs24
• Multiple vulnerabilities in Red Hat Advanced Cluster Security for Kubernetes 4.11
• IBM Maximo Application Suite - Visual Inspection Component update for brace-expansion
• Red Hat Enterprise Linux 10 update for nodejs-nodemon
• Red Hat Enterprise Linux 10 update for nodejs22
• Inefficient Algorithmic Complexity in Red Hat OpenShift Container Platform 4.19
• Inefficient Algorithmic Complexity in Red Hat OpenShift Container Platform 4.18