CVE-2026-13706 UrlShortener extension url validation can be bypassed due to difference between php url parsing and WHATWG
Attackers can bypass URL validation in the UrlShortener extension by exploiting parsing differences between PHP and WHATWG standards.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-13706?
CVE-2026-13706 is a vulnerability in Mediawiki Mediawiki, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper input validation vulnerability in Wikimedia Foundation UrlShortener.
This vulnerability is associated with program files includes/UrlShortenerUtils.Php.
Weakness: CWE-20
Which versions are affected by CVE-2026-13706?
It affects 1 product.
Products include Mediawiki Mediawiki.
How do I fix CVE-2026-13706?
Apply the vendor's patch.
Is CVE-2026-13706 being exploited?
There is no known exploitation of CVE-2026-13706 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as GHSA-v4ch-5p7w-6w58, MINI-43m3-v7rw-6mwg, MINI-63gp-r8h3-qg76, MINI-j5qw-gmfr-x6g2.