CVE-2026-100241 Private change tags exposed to anonymous users via revision-tags-change events
An attacker can view private change tags intended for authorized users only, exposing sensitive metadata to anonymous visitors.
- 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-2026-100241?
CVE-2026-100241 is a high-severity vulnerability in Wikimedia Foundation Mediawiki - EventBus 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 - EventBus Extension allows Excavation.
This issue affects Mediawiki - EventBus Extension: 1.47.0-alpha.
Weakness: CWE-200
Which versions are affected by CVE-2026-100241?
How do I fix CVE-2026-100241?
No fix has been published for CVE-2026-100241 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-100241 being exploited?
There is no known exploitation of CVE-2026-100241 in the wild and no public exploit code.
Sources
Also known as GHSA-hm8p-x35f-6gwh.