CVE-2020-26302

Description

is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop “forever." This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.

Weakness classification

• security-advisories@github.com: CWE-400
• nvd@nist.gov: CWE-1333

Primary references

• security-advisories@github.com — Issue Tracking, Third Party Advisory
• security-advisories@github.com — Exploit, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory