CVE-2026-5266 Affecting mediawiki package, versions <1:1.43.8+dfsg-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-DEBIAN14-MEDIAWIKI-15929460
- published8 Apr 2026
- disclosed11 May 2026
Introduced: 8 Apr 2026
CVE-2026-5266 (opens in a new tab)How to fix?
Upgrade Debian:14 mediawiki to version 1:1.43.8+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mediawiki package and not the mediawiki package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.
This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php.
This issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.