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CVE-2026-103442

MergeAccount PHP object injection via session-key substitution

External control of system or configuration setting vulnerability in The Wikimedia Foundation MediaWiki CentralAuth extension allows Code Injection. This issue affects MediaWiki CentralAuth extension: 1.46, 1.45, and 1.43.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Wikimedia
Products
Mediawiki - Centralauth Extension
CVE-2026-103047

XSS through i18n message in CentralAuth

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth extension allows Stored XSS. This issue affects Mediawiki - CentralAuth extension: before 1.46.1, 1.45.5, 1.43.10.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Wikimedia
Products
Mediawiki - Centralauth Extension
CVE-2026-100244

CentralAuth exposes locally suppressed block information via globaluserinfo API and Special:CentralAuth (incomplete fix for CVE-2025-62669)

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows Excavation. This issue affects Mediawiki - CentralAuth Extension: from * before 1.46.1, 1.45.5, 1.43.10.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Wikimedia
Products
Mediawiki - Centralauth Extension
CVE-2026-39937

Global vanishing does not completely remove user email

Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth Extension allows Resource Leak Exposure. The issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Wikimedia
Products
Mediawiki - Centralauth Extension