What is CVE-2026-58025?

CVE-2026-58025 is a critical-severity vulnerability in MediaWiki, classified under Code Injection. CVSS score: 9.8/10. Published 2026-07-01.

How severe is CVE-2026-58025?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2026-58025 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in MediaWiki

CVE-2026-58025

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.

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.003 (24.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mediawiki — versions 1.46.0
Wikimedia Foundation Mediawiki

Weakness classification (CWE)

Public proof-of-concept exploits

shinthink/CVE-2026-58025

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Permissions Required)

Frequently asked questions

What is CVE-2026-58025?: CVE-2026-58025 is a critical-severity vulnerability in MediaWiki, classified under Code Injection. CVSS score: 9.8/10. Published 2026-07-01.
How severe is CVE-2026-58025?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-58025 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.