User localization leaked by AbuseFilter + EventStream_CVE-2026-34091

5.5 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/R:U

Description

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

This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

Basic Information

ID CVE-2026-34091

Source wikimedia-foundation

Published May 11, 2026 at 14:55

Affected Product

Vendor Wikimedia Foundation

Product MediaWiki

Version *

Affected Versions Wikimedia Foundation MediaWiki *

CWE Classification

CWE-200

References

phabricator.wikimedia.org /T411305

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    "description": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki.\n\nThis issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.",
    "published": "2026-05-11T14:55:33.419Z",
    "modified": "2026-05-11T14:55:33.419Z",
    "type": "cve",
    "title": "User localization leaked by AbuseFilter + EventStream",
    "source": "wikimedia-foundation",
    "references": "https://phabricator.wikimedia.org/T411305",
    "id": "CVE-2026-34091",
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