CVE-2026-58517: Blocked users can create and edit WikiLambda objects

Published Jul 1, 2026
·
Updated

Improper neutralization of input terminators vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension allows Authentication Bypass.

This issue affects Mediawiki - WikiLambda Extension: from before 1.43.9,1.44.6,1.45.4.

Affected Software

4 affected components
Wikimedia Foundation MediaWiki - WikiLambda Extension><=1.43.9, ><=1.44.6, ><=1.45.4
MediaWiki MediaWiki>=1.43.0<1.43.9
MediaWiki MediaWiki>=1.44.0<1.44.6
MediaWiki MediaWiki>=1.45.0<1.45.4

Event History

Jul 1, 2026
CVE Published
via MITRE·06:23 PM
Data Sourced
via MITRE·06:23 PM
DescriptionWeakness
Data Sourced
via NVD·07:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-58517?

CVE-2026-58517 has a medium severity rating of 6.9 according to the CVSS v3.0 scoring system.

2

How do I fix CVE-2026-58517?

To mitigate CVE-2026-58517, users should upgrade the MediaWiki - WikiLambda Extension to versions 1.43.9, 1.44.6, or 1.45.4 or later.

3

What type of vulnerability is CVE-2026-58517?

CVE-2026-58517 is classified as an improper neutralization of input terminators vulnerability, leading to authentication bypass.

4

Which software is affected by CVE-2026-58517?

CVE-2026-58517 affects the Wikimedia Foundation MediaWiki - WikiLambda Extension in versions prior to 1.43.9, 1.44.6, and 1.45.4.

5

What is the potential impact of CVE-2026-58517?

The potential impact of CVE-2026-58517 includes allowing blocked users to create and edit WikiLambda objects, which undermines user access controls.

Company

Resources

Contact

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