CVE-2026-48801

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Source
https://cve.org/CVERecord?id=CVE-2026-48801
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-48801.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-48801
Aliases
Downstream
Related
Published
2026-07-14T20:03:56.430Z
Modified
2026-07-17T03:31:30.648780588Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
linkify-it: Quadratic algorithmic complexity in LinkifyIt#match scan loop
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48801.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/markdown-it/linkify-it

Affected ranges

Type
GIT
Repo
https://github.com/markdown-it/linkify-it
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6be6d15e0641bf1daeaa977d500cabc743166159
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "5.0.1"
        }
    ]
}

Affected versions

0.*
0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5
1.*
1.0.0
1.0.1
1.1.0
1.1.1
1.2.0
1.2.1
1.2.2
1.2.3
1.2.4
2.*
2.0.0
2.0.1
2.0.2
2.0.3
2.1.0
2.2.0
3.*
3.0.0
3.0.1
3.0.2
3.0.3
4.*
4.0.0
4.0.1
5.*
5.0.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-48801.json"