What is CVE-2026-58029?

CVE-2026-58029 is a medium-severity vulnerability in MediaWiki, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-07-01.

How severe is CVE-2026-58029?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in MediaWiki

CVE-2026-58029

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiChangeAuthenticationData.Php, includes/Api/ApiLinkAccount.Php, includes/Api/ApiRemoveAuthenticationData.Php, includes/Specials/SpecialLinkAccounts.Php, includes/Specials/SpecialUnlinkAccounts.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Vulnerability class: Broken Authentication

EPSS: 0.002 (12.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Mediawiki — versions 1.46.0
Wikimedia Foundation Mediawiki

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Permissions Required)

Frequently asked questions

What is CVE-2026-58029?: CVE-2026-58029 is a medium-severity vulnerability in MediaWiki, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-07-01.
How severe is CVE-2026-58029?: Medium severity. CVSS v3 base score is 6.5 out of 10.