What is CVE-2026-58027?

CVE-2026-58027 is a medium-severity vulnerability in MediaWiki, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-07-01.

How severe is CVE-2026-58027?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in MediaWiki

CVE-2026-58027

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.

Vulnerability class: Information Disclosure

EPSS: 0.002 (14.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Mediawiki — versions 1.46.0
Wikimedia Foundation Abusefilter

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Permissions Required)

Frequently asked questions

What is CVE-2026-58027?: CVE-2026-58027 is a medium-severity vulnerability in MediaWiki, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-07-01.
How severe is CVE-2026-58027?: Medium severity. CVSS v3 base score is 6.5 out of 10.