CVE-2026-100377 Revision-deleted pages can be viewed through WikiLambda's action=edit and Special:ViewAbstract
Attackers can view deleted revision content via specific edit and view actions, exposing sensitive information to unauthorized users.
- 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-2026-100377?
CVE-2026-100377 is a medium-severity vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension, published on 25 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 - WikiLambda Extension allows Excavation.
This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.
Weakness: CWE-200
Which versions are affected by CVE-2026-100377?
How do I fix CVE-2026-100377?
No fix has been published for CVE-2026-100377 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-100377 being exploited?
There is no known exploitation of CVE-2026-100377 in the wild and no public exploit code.
Sources
Also known as GHSA-cmgj-p48r-86gm.