CVE-2026-58033 Information disclosure in MediaWiki
Attackers can view deleted author names in MediaWiki statistics, exposing sensitive user information to unauthorized actors.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-58033?
CVE-2026-58033 is a medium-severity vulnerability in Mediawiki Mediawiki, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki.
This vulnerability is associated with program files includes/Actions/InfoAction.Php.
This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.
Weakness: CWE-200
Which versions are affected by CVE-2026-58033?
It affects 1 product.
Products include Mediawiki Mediawiki.
How do I fix CVE-2026-58033?
Upgrade to a fixed version.
Is CVE-2026-58033 being exploited?
There is no known exploitation of CVE-2026-58033 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as DEBIAN-CVE-2026-58033, GHSA-r39h-799c-h846, MINI-7x7r-xq34-6vpc, MINI-9r25-cmj9-qxw2, MINI-gv9f-g738-x4ch, UBUNTU-CVE-2026-58033.