CVE-2026-58027 PUBLISHED

QueryAbuseFilter API can be used to see the hit count of private filters, which is hidden in the UI

Assigner: wikimedia-foundation
Reserved: 27.06.2026 Published: 01.07.2026 Updated: 01.07.2026

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation AbuseFilter.

This vulnerability is associated with program files includes/Api/QueryAbuseFilters.Php.

This issue affects AbuseFilter: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Vendor	Wikimedia Foundation
Product	AbuseFilter
Versions	Default: unaffected affected from * to 1.46.0, 1.45.4, 1.44.6, 1.43.9 (excl.)