How severe is CVE-2026-34095?

CVE-2026-34095 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-34095 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34095?

CVE-2026-34095 affects Mediawiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34095?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34095 have an EU (EUVD) identifier?

Yes. CVE-2026-34095 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29109.

When was CVE-2026-34095 published?

CVE-2026-34095 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-34095

CVE-2026-34095 is a medium-severity vulnerability in Mediawiki with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-668.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 0.0
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29109
Weakness: CWE-668
Affected product: Mediawiki
Published: 2026-05-11
Last modified: 2026-06-17

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.

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.
How severe is CVE-2026-34095?: CVE-2026-34095 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-34095 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34095?: CVE-2026-34095 affects Mediawiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34095?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34095 have an EU (EUVD) identifier?: Yes. CVE-2026-34095 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29109.
When was CVE-2026-34095 published?: CVE-2026-34095 was published on 2026-05-11 and last updated on 2026-06-17.

References

https://phabricator.wikimedia.org/T419192

Affected products (1)

cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*

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