What is GHSA-v2p6-4mp7-3r9v?

GHSA-v2p6-4mp7-3r9v is a security advisory published by GitHub Security Advisories with Medium severity. Regular Expression Denial of Service in underscore.string

Why does GHSA-v2p6-4mp7-3r9v have no CVE ID yet?

GitHub Security Advisories published this advisory directly to customers before NVD assigned a CVE ID. This is the embargo-window disclosure pattern — vendors notify customers on day 0; NVD's public record follows days to weeks later.

Which products are affected by GHSA-v2p6-4mp7-3r9v?

GHSA-v2p6-4mp7-3r9v affects 1 product, including: npm/underscore.string:\u003c 3.3.5.

GHSA-v2p6-4mp7-3r9vMediumDisclosed before NVD

Regular Expression Denial of Service in underscore.string

Vendor

GitHub Security Advisories

Published

June 14, 2019

Last Modified

January 9, 2023

📋 Description

Versions of underscore.string prior to 3.3.5 are vulnerable to Regular Expression Denial of Service (ReDoS).

The function unescapeHTML is vulnerable to ReDoS due to an overly-broad regex. The slowdown is approximately 2s for 50,000 characters but grows exponentially with larger inputs.

Recommendation

Upgrade to version 3.3.5 or higher.

🎯 Affected products1

npm/underscore.string:< 3.3.5

🔗 References (5)

https://github.com/epeli/underscore.string/issues/510
https://github.com/epeli/underscore.string/pull/517
https://github.com/epeli/underscore.string/commit/f486cd684c94c12db48b45d52b1472a1b9661029
https://www.npmjs.com/advisories/745
https://github.com/advisories/GHSA-v2p6-4mp7-3r9v