CVE-2026-103440 pagetriagelist discloses suppressed reviewer usernames
The PageTriage extension leaks suppressed reviewer usernames, allowing attackers to identify users who have been hidden from public view.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-103440?
CVE-2026-103440 is a low-severity vulnerability in The Wikimedia Foundation MediaWiki PageTriage extension, published on 30 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Exposure of sensitive information through data queries vulnerability in The Wikimedia Foundation MediaWiki PageTriage extension allows Information Elicitation.
This issue affects MediaWiki PageTriage extension: 1.46, 1.45, and 1.43.
Weakness: CWE-202
Which versions are affected by CVE-2026-103440?
How do I fix CVE-2026-103440?
No fix has been published for CVE-2026-103440 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103440 being exploited?
There is no known exploitation of CVE-2026-103440 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-vp5g-xhpv-4wq4.