CVE WatchJul 15, 2026

CVE-2026-48801

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.1, LinkifyIt.prototype.match, the package's primary public

CVSS

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No CVSS

EPSS

0.4%

p36

KEV

—

Exploit Today

0-100

Published: Jul 14, 2026 · Last modified: Jul 15, 2026 · CWE-1333

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-07-152026-07-18

Technical description

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.1, LinkifyIt.prototype.match, the package's primary public API, has O(N²) algorithmic complexity for inputs containing many fuzzy links or emails because the JavaScript-level scan loop re-slices input and re-runs unanchored regex searches on progressively shorter tails. Any service that synchronously renders untrusted Markdown with linkify:true on a request hot path can inherit a worker-process denial of service triggerable by a tens-of-KB request body. This issue is fixed in version 5.0.1.

Official references

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