Information Exposure Vulnerability in MediaWiki by Wikimedia Foundation
CVE-2026-34093

1.1LOW

Key Information:

Vendor

Wikimedia Foundation

Status
Mediawiki
Vendor
CVE Published:
11 May 2026

What is CVE-2026-34093?

A vulnerability in Wikimedia Foundation's MediaWiki software allows unauthorized actors to gain access to sensitive information. This issue lies within the program files at includes/Specials/SpecialUserRights.php and affects several versions of MediaWiki prior to 1.43.7, 1.44.4, and 1.45.2. This exposure could potentially lead to unauthorized visibility of critical user rights and permissions, raising concerns about user data confidentiality.

Affected Version(s)

MediaWiki * < 1.43.7, 1.44.4, 1.45.2

References

https://phabricator.wikimedia.org/T414547

CVSS V4

Score:
1.1
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.