CVE-2026-34095: mediawiki Resource Exposure — Fix

Description

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Actions/ActionEntryPoint.Php, includes/Request/FauxResponse.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

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CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0003

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-668 CWE-668

Affected Products

Vendor	Product	Versions
mediawiki	mediawiki	< 1.43.7
mediawiki	mediawiki	1.44.0 — 1.44.4
mediawiki	mediawiki	1.45.0 — 1.45.2

References

Advisories & Patches

https://phabricator.wikimedia.org/T419192

Frequently Asked Questions

What is CVE-2026-34095? +

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Actions/ActionEntryPoint.Php, includes/Request/FauxResponse.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-34095? +

CVE-2026-34095 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-34095? +

CVE-2026-34095 affects products from mediawiki, specifically: mediawiki. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-34095? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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