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CVE-2026-58025

Mediawiki insecure deserialization

9.8 CRITICALEPSS 0.50%
  1. Published1 Jul 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mediawiki≥ 1.43.0 < 1.43.9 · ≥ 1.44.0 < 1.44.6 · ≥ 1.45.0 < 1.45.4 · 1.46.0

Remediation

Fixed in
Mediawiki≥ 1.43.9

References

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Frequently asked

Is CVE-2026-58025 being actively exploited?

CVE-2026-58025 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.50%.

How severe is CVE-2026-58025?

CVE-2026-58025 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.50% probability of exploitation.

Which products are affected by CVE-2026-58025?

Affected products include Mediawiki.

How do I fix CVE-2026-58025?

Upgrade affected software to a fixed version, for example Mediawiki 1.43.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-58025 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.