Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files.

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

Attack Vector Network

Attack Complexity High

Privileges Required Low

Attack Requirements Present

User Interaction Active

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 Wikibase extension unaffected
Version Status Constraints
1.46 affected —
1.45 affected —
1.43 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

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/Id35bf747e48370e474d9b9444bd7520b24836e8d cve-icon cve-icon
https://phabricator.wikimedia.org/T435210 cve-icon cve-icon
History

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

Type Values Removed Values Added
Description Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files. This issue affects MediaWiki Wikibase extension: 1.46, 1.45, and 1.43.
Title Unauthenticated arbitrary file deletion through Wikibase serialized entity parsing
Weaknesses CWE-502
References
Metrics cvssV4_0

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

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-09-30T15:59:42.361Z

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

Link: CVE-2026-103441

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-30T16:17:09.860

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

Link: CVE-2026-103441

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T17:30:19Z

Weaknesses