CVE-2026-34094 Open redirect in MediaWiki
An attacker can exploit a missing prefix in help links to redirect users to unintended locations, potentially bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-34094?
CVE-2026-34094 is a low-severity vulnerability in Mediawiki Mediawiki, published on 11 May 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Vulnerability in Wikimedia Foundation MediaWiki.
This vulnerability is associated with program files includes/Page/Article.Php.
This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.
Weakness: CWE-668
Which versions are affected by CVE-2026-34094?
It affects 1 product.
Products include Mediawiki Mediawiki.
How do I fix CVE-2026-34094?
Upgrade to a fixed version.
Is CVE-2026-34094 being exploited?
There is no known exploitation of CVE-2026-34094 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as DEBIAN-CVE-2026-34094, GHSA-g863-m67x-whh5, UBUNTU-CVE-2026-34094.