Bug 2500656 (CVE-2026-48801) - CVE-2026-48801 linkify-it: linkify-it: Denial of Service via algorithmic complexity vulnerability
Summary: CVE-2026-48801 linkify-it: linkify-it: Denial of Service via algorithmic comp...
Keywords:
Status: NEW
Alias: CVE-2026-48801
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2500946 2500947 2500948 2500949 2500945 2500950 2500951
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-14 21:03 UTC by OSIDB Bzimport
Modified: 2026-07-20 12:17 UTC (History)
24 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-07-14 21:03:18 UTC
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.


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