CVE-2017-16021

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-06-04 · updated 2026-06-17
Weakness: CWE-400

Description

uri-js is a module that tries to fully implement RFC 3986. One of these features is validating whether or not a supplied URL is valid or not. To do this, uri-js uses a regular expression, This regular expression is vulnerable to redos. This causes the program to hang and the CPU to idle at 100% usage while uri-js is trying to validate if the supplied URL is valid or not. To check if you're vulnerable, look for a call to `require("uri-js").parse()` where a user is able to send their own input. This affects uri-js 2.1.1 and earlier.

Affected products

garycourt uri-js: through 2.1.1

References

https://github.com/garycourt/uri-js/issues/12
https://nodesecurity.io/advisories/100
https://github.com/garycourt/uri-js/issues/12
https://nodesecurity.io/advisories/100

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