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CVE-2026-103441Unauthenticated arbitrary file deletion through Wikibase serialized entity parsing

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.

Timeline

  1. ID reserved

    By wikimedia-foundation

  2. Published

  3. · 40 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-103441, by who scored it
Scored byCVSSScoreVector
wikimedia-foundationCNA (assigner)4.0High7.2CVSS: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
NVDNVD · Awaiting Analysis4.0High7.2CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:I/V:C/RE:M/U:Red
EPSS (exploitation in 30 days)
0.28% · top 79% of all CVEs (14 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Affected products

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2026-103441 badge
[![CVE-2026-103441](https://cveledger.app/badge/CVE-2026-103441.svg)](https://cveledger.app/cve/CVE-2026-103441)

Record last updated .