CVE-2026-39937 Global vanishing does not completely remove user email
Attackers can recover user email addresses that were supposed to be removed during global account vanishing, exposing sensitive personal data.
- 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-2026-39937?
CVE-2026-39937 is a high-severity vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth Extension, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth Extension allows Resource Leak Exposure. The issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.
Weakness: CWE-212
Which versions are affected by CVE-2026-39937?
How do I fix CVE-2026-39937?
No fix has been published for CVE-2026-39937 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-39937 being exploited?
There is no known exploitation of CVE-2026-39937 in the wild and no public exploit code.
Sources
Also known as GHSA-86vf-rp56-mhf8.