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CVE-2026-58025

MediumPublished

Remote Code Execution via Unsafe Deserialization in LogItem Import

Published: Jul 1, 2026
Updated: Jul 1, 2026
Assigning CNA: wikimedia-foundation
Evidence observed: Aug 6, 2026

Primary CVSS

5.9/ 10Medium

nvd · CVSS 4.0

CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:L/E:X/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:X/AU:X/R:X/V:X/RE:X/U:X

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 41.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Deserialization of untrusted data vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Import/WikiImporter.Php, includes/Import/WikiRevision.Php, includes/Logging/LogEntryBase.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Sources

CVE-2026-58025Exploit
CVE-2026-58025 — MediaWiki Deserialization RCE via Log Entry Import. LogEntryBase::extractParams() unserialize() user-controlled log_params. CVSS 9.8 | CWE-502 | MediaWiki < 1.43.9, < 1.44.6, < 1.45.4, < 1.46.0

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