CVE-2026-34086

LOW

AbuseFilter misuses ::userCanBitfield, exposing access-controlled information

Title source: cna

Description

Vulnerability in Wikimedia Foundation AbuseFilter. This issue affects AbuseFilter: from * before 1.43.7, 1.44.4, 1.45.2.

References (1)

Core 1

Core References

https://phabricator.wikimedia.org/T415584

Scores

CVSS v4 2.1

EPSS 0.0024

EPSS Percentile 15.3%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-20

Status published

Products (1)

Wikimedia Foundation/AbuseFilter < 1.43.7, 1.44.4, 1.45.2

Published May 11, 2026

Tracked Since May 11, 2026