CVE-2026-34088

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.

CVSS 4.0

1.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/R:U/RE:M

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 21% of CVEs (scores of 2026-10-26)

CWE

CWE-200

Published

2026-05-11

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• mediawiki:mediawiki

References

• https://phabricator.wikimedia.org/T410429

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