Sensitive Information Exposure in Wikimedia Foundation AbuseFilter
CVE-2026-58027

5.3MEDIUM

Key Information:

Vendor

Wikimedia Foundation

Status
Abusefilter
Vendor
CVE Published:
1 July 2026

What is CVE-2026-58027?

A vulnerability in the Wikimedia Foundation's AbuseFilter can potentially expose sensitive information to unauthorized actors. It originates from a flaw in specific program files, particularly 'includes/Api/QueryAbuseFilters.php'. This issue allows attackers to gain access to sensitive details that should remain protected, impacting user data confidentiality and overall system security. Users are advised to update to the latest version to mitigate any risks associated with this vulnerability.

Affected Version(s)

AbuseFilter * < 1.46.0, 1.45.4, 1.44.6, 1.43.9

References

https://phabricator.wikimedia.org/T406954

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.