Inefficient Algorithmic Complexity Affecting linkify-it package, versions <5.0.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-LINKIFYIT-17901217
- published9 Jul 2026
- disclosed8 Jul 2026
- creditKyo
Introduced: 8 Jul 2026
NewCVE-2026-59887 (opens in a new tab)How to fix?
Upgrade linkify-it to version 5.0.2 or higher.
Overview
linkify-it is a Links recognition library with FULL unicode support
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity in the mailto: validator scan-loop on attacker-supplied text. An attacker can cause excessive CPU consumption by submitting specially crafted input that triggers repeated scanning of the remaining text.