Wikimedia OATHAuth up to 1.43.6/1.44.3/1.45.1 information disclosure

Summaryinfo

A vulnerability identified as problematic has been detected in Wikimedia OATHAuth up to 1.43.6/1.44.3/1.45.1. This vulnerability affects unknown code. The manipulation leads to information disclosure. This vulnerability is documented as CVE-2026-34087. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Wikimedia OATHAuth up to 1.43.6/1.44.3/1.45.1 and classified as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. This issue affects OATHAuth: from * before 1.43.7, 1.44.4, 1.45.2.

It is possible to read the advisory at phabricator.wikimedia.org. The identification of this vulnerability is CVE-2026-34087 since 03/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 321929 (Debian dla-4640 : mediawiki - security update), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (321929). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• Wikimedia

Name

• OATHAuth

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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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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