Ubuntu Security Notices USN-8290-1 USN-8290-1: Path-to-Regexp vulnerability Publication date 21 May 2026 Overview Path-to-Regexp could be made to crash if it received specially crafted network traffic. Releases 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS 16.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages node-path-to-regexp - Turn a path string such as /user/:name into a regular expression. Details It was discovered that Path-to-Regexp incorrectly handled route patterns containing multiple named parameters separated by non-delimiter characters such as hyphens. An attacker could possibly use this issue to cause a denial of service via catastrophic backtracking in the generated regular expressions. It was discovered that Path-to-Regexp incorrectly handled route patterns containing multiple named parameters separated by non-delimiter characters such as hyphens. An attacker could possibly use this issue to cause a denial of service via catastrophic backtracking in the generated regular expressions. Update instructions In general, a standard system update will make all the necessary changes. Learn more about how to get the fixes. The problem can be corrected by updating your system to the following package versions: Ubuntu Release Package Version 24.04 LTS noble node-path-to-regexp – 6.2.1-1ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 22.04 LTS jammy node-path-to-regexp – 6.2.0-2ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 20.04 LTS focal node-path-to-regexp – 6.1.0-2ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 18.04 LTS bionic node-path-to-regexp – 1.0.1-1ubuntu0.18.04.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 16.04 LTS xenial node-path-to-regexp – 1.0.1-1ubuntu0.16.04.1~esm1 Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Get Ubuntu Pro References CVE-2024-45296 CVE-2024-45296