External control of system or configuration setting vulnerability in The Wikimedia Foundation MediaWiki CentralAuth extension allows Code Injection.

This issue affects MediaWiki CentralAuth extension: 1.46, 1.45, and 1.43.

Attack Vector Network

Attack Complexity High

Privileges Required High

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact Low

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
The Wikimedia Foundation MediaWiki CentralAuth extension unaffected
Version Status Constraints
1.46 affected —
1.45 affected —
1.43 affected —

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gerrit.wikimedia.org/r/q/I9c59e5c3f217c1eaa02934a076604049bac2b025 cve-icon cve-icon
https://phabricator.wikimedia.org/T435624 cve-icon cve-icon
History

Wed, 30 Sep 2026 16:15:00 +0000

Type Values Removed Values Added
Description External control of system or configuration setting vulnerability in The Wikimedia Foundation MediaWiki CentralAuth extension allows Code Injection. This issue affects MediaWiki CentralAuth extension: 1.46, 1.45, and 1.43.
Title MergeAccount PHP object injection via session-key substitution
Weaknesses CWE-15
References
Metrics cvssV4_0

{'score': 7.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-09-30T16:09:40.369Z

Reserved: 2026-09-30T15:41:01.270Z

Link: CVE-2026-103442

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-30T16:17:10.050

Modified: 2026-09-30T16:27:40.143

Link: CVE-2026-103442

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T18:00:17Z

Weaknesses