What is CVE-2026-34093?

CVE-2026-34093 is a medium-severity vulnerability in Mediawiki, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-05-11.

How severe is CVE-2026-34093?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Mediawiki

CVE-2026-34093

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Specials/SpecialUserRights.Php. This issue affects MediaWiki: fro…

Vulnerability class: Information Disclosure

EPSS: 0.000 (11.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Mediawiki
Wikimedia Foundation Mediawiki

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Permissions Required, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34093?: CVE-2026-34093 is a medium-severity vulnerability in Mediawiki, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-05-11.
How severe is CVE-2026-34093?: Medium severity. CVSS v3 base score is 5.3 out of 10.