Is CVE-2026-34091 actively exploited?

No active exploitation of CVE-2026-34091 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34091 be exploited remotely?

Yes. CVE-2026-34091 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34091?

CVE-2026-34091 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-34091

HIGH

CVE-2026-34091

CWE-200Published: May 11, 2026· Updated: May 14, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.9th

Official Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki.

This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

NVD Source

Technical Analysis

CVE-2026-34091 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.