CVE-2026-34091

published 2026-05-11

CVE-2026-34091: Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This issue affects MediaWiki: from * before 1.43.7…

Priority P3 40 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C H I N A N

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.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
debian	mediawiki	< mediawiki 1:1.43.8+dfsg-1 (forky)	mediawiki 1:1.43.8+dfsg-1 (forky)
mediawiki	mediawiki	< 1.43.7	1.43.7
mediawiki	mediawiki	>= 1.44.0 < 1.44.4	1.44.4
mediawiki	mediawiki	>= 1.45.0 < 1.45.2	1.45.2
wikimedia_foundation	mediawiki	>= * < 1.43.7, 1.44.4, 1.45.2	1.43.7, 1.44.4, 1.45.2

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd v4.0 5.5 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/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:X/AU:X/R:U/V:X/RE:X/U:X

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CWE-200