CVE-2026-58029
Received Received - Intake

Authentication Bypass in MediaWiki

Publication date: 2026-07-01

Last updated on: 2026-07-01

Assigner: wikimedia-foundation

Description
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.

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Meta Information

Published
2026-07-01
Last Modified
2026-07-01
Generated
2026-07-01
AI Q&A
2026-07-01
EPSS Evaluated
N/A
NVD
CVE-2026-58029
EUVD
EUVD-2026-41030

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
wikimedia mediawiki to 1.46.0 (exc)
wikimedia mediawiki 1.45.4
wikimedia mediawiki 1.44.6
wikimedia mediawiki 1.43.9

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

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Executive Summary

This vulnerability affects the Wikimedia Foundation's MediaWiki software, specifically in several API and special page files related to authentication and account linking/unlinking.

It impacts versions of MediaWiki before 1.46.0, including 1.45.4, 1.44.6, and 1.43.9.

The vulnerability involves files such as ApiChangeAuthenticationData.php, ApiLinkAccount.php, ApiRemoveAuthenticationData.php, SpecialLinkAccounts.php, and SpecialUnlinkAccounts.php, which handle authentication data and account linking features.

Impact Analysis

The vulnerability has a CVSS v4.0 base score of 5.3, indicating a moderate severity.

It can be exploited remotely (AV:N) with low attack complexity (AC:L) and does not require privileges (PR:N), but requires user interaction (UI:P).

The impact involves low confidentiality, integrity, and availability impacts (VC:L, VI:L, SC:L, SI:L), which suggests that an attacker could potentially access or modify some authentication data or affect account linking features, possibly leading to unauthorized account access or manipulation.

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