CVE-2026-103441

Unauthenticated arbitrary file deletion through Wikibase serialized entity parsing

Published Sep 30, 2026 CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Wikimedia
Wikimedia mediawiki-wikibase Extension
Vendors & Products Wikimedia
Wikimedia mediawiki-wikibase Extension
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wikimedia-foundation
Published
Updated
Nov 9, 2026, 4:29 PM
Reserved
Sep 30, 2026, 3:41 PM
Status
Awaiting Analysis
Published
Sep 30, 2026, 4:17 PM
Modified
Nov 9, 2026, 5:17 PM