High severity · published Jul 1, 2026
CVE-2026-13706
UrlShortener extension url validation can be bypassed due to difference between php url parsing and WHATWG
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
Improper input validation vulnerability in Wikimedia Foundation UrlShortener.
This vulnerability is associated with program files includes/UrlShortenerUtils.Php.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UR
UrlShortener · Wikimedia Foundation
through 1.46.0, 1.45.4, 1.44.6, 1.43.9 · source: vendor
ME
Mediawiki · Mediawiki
1.43.0 before 1.43.9; 1.44.0 before 1.44.6; 1.45.0 before 1.45.4; 1.46.0 · source: NVD