CVE-2026-103048 Open Redirect in Special:Book
Attackers can redirect users to malicious sites via the Special:Book page, potentially facilitating phishing attacks against MediaWiki users.
- 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
- None listed
What is CVE-2026-103048?
CVE-2026-103048 is a medium-severity vulnerability in The Wikimedia Foundation Mediawiki - Collection extension, published on 29 Sep 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
URL redirection to untrusted site ('open redirect') vulnerability in The Wikimedia Foundation Mediawiki - Collection extension allows Fake the Source of Data.
This issue affects Mediawiki - Collection extension: before 1.46.1, 1.45.5, 1.43.10.
Weakness: CWE-601
Which versions are affected by CVE-2026-103048?
How do I fix CVE-2026-103048?
No fix has been published for CVE-2026-103048 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103048 being exploited?
There is no known exploitation of CVE-2026-103048 in the wild and no public exploit code.
Sources
Also known as GHSA-h46v-wcxp-q8jp, UBUNTU-CVE-2026-103048.