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Vulnerabilities CVE-2026-48801

CVE-2026-48801

High
Open
TLP:CLEAR

linkify-it: Quadratic algorithmic complexity in LinkifyIt#match scan loop

NVD CVE.org
Critical Infrastructure DDoS

AI Analysis

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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.

Details

CVSS Score
8.7
EPSS Score
0.35%

28.1th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Jul 14, 2026
Last Modified
Jul 15, 2026
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