Wikimedia CentralAuth Extension up to 1.43.6/1.44.3/1.45.1 on Mediawiki improper removal of sensitive information before storage or transfer

Summaryinfo

A vulnerability marked as critical has been reported in Wikimedia CentralAuth Extension up to 1.43.6/1.44.3/1.45.1 on Mediawiki. The impacted element is an unknown function. Performing a manipulation results in improper removal of sensitive information before storage or transfer. This vulnerability is cataloged as CVE-2026-39937. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Wikimedia CentralAuth Extension up to 1.43.6/1.44.3/1.45.1 on Mediawiki. This affects an unknown code. The manipulation with an unknown input leads to a improper removal of sensitive information before storage or transfer vulnerability. CWE is classifying the issue as CWE-212. The product stores, transfers, or shares a resource that contains sensitive information, but it does not properly remove that information before the product makes the resource available to unauthorized actors. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth Extension allows Resource Leak Exposure.This issue affects non release branches.

The weakness was shared by Urbanecm. The advisory is shared at phabricator.wikimedia.org. This vulnerability is uniquely identified as CVE-2026-39937 since 04/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 1.43.7, 1.44.4 or 1.45.2 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• Wikimedia

Name

• CentralAuth Extension

Version

• 1.43.0
• 1.43.1
• 1.43.2
• 1.43.3
• 1.43.4
• 1.43.5
• 1.43.6
• 1.44.0
• 1.44.1
• 1.44.2
• 1.44.3
• 1.45.0
• 1.45.1

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Threat Intelligenceinfo

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Timelineinfo

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Entryinfo

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