CVE-2026-58027

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

State: Published
Severity: 5.3 Medium
Published: Jul 1, 2026
Updated: Jul 1, 2026
Reserved: Jun 27, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	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	wikimedia-foundation

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
AbuseFilterWikimedia Foundation	before 1.46.0, 1.45.4, 1.44.6, 1.43.9Affected

References

https://phabricator.wikimedia.org/T406954

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