CVE-2026-34086lowCWE-20

CVE-2026-34086: low-severity vulnerability in Wikimedia Foundation AbuseFilter

AbuseFilter misuses ::userCanBitfield, exposing access-controlled information

Published

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8Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 2.1epss 0.2%
Vulnerability in Wikimedia Foundation AbuseFilter. This issue affects AbuseFilter: from * before 1.43.7, 1.44.4, 1.45.2.
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/S:N/AU:Y
Affected products
Wikimedia Foundation · AbuseFilter
Related CVEs — Wikimedia Foundation AbuseFilter

In the same product, most dangerous first.

CVE-2025-6592LOWCreating a permanent account from a temporary account associates temp username and IP address with real username in AbuseLogEPSS 0.4%CVE-2026-58027MEDIUMQueryAbuseFilter API can be used to see the hit count of private filters, which is hidden in the UIEPSS 0.4%