CVE-2026-58026

MEDIUMCVSS 5.7/10EPSS 0.38%

Last modified

CVE-2026-58026 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Parser/Parser.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.. EPSS estimates a 0.38% chance of exploitation in the next 30 days.

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Parser/Parser.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Metrics

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
MediawikiMediawiki>= 1.43.0, < 1.43.9—
MediawikiMediawiki>= 1.44.0, < 1.44.6—
MediawikiMediawiki>= 1.45.0, < 1.45.4—
MediawikiMediawiki1.46.0Rc0

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-58026?
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Parser/Parser.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.
How severe is CVE-2026-58026?
CVE-2026-58026 has a CVSS score of 5.7/10 (MEDIUM severity). The EPSS model estimates a 0.38% probability of exploitation in the next 30 days.
How do I fix CVE-2026-58026?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST