CVE-2026-100244 Information disclosure in Mediawiki - CentralAuth Extension
Attackers can view locally suppressed block information via the globaluserinfo API and Special:CentralAuth pages in MediaWiki.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100244?
CVE-2026-100244 is a high-severity vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows Excavation.
This issue affects Mediawiki - CentralAuth Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Weakness: CWE-200
Which versions are affected by CVE-2026-100244?
How do I fix CVE-2026-100244?
No fix has been published for CVE-2026-100244 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-100244 being exploited?
There is no known exploitation of CVE-2026-100244 in the wild and no public exploit code.
Sources
Also known as GHSA-8fvg-vv8m-prf7.