Is there a patch available for CVE-2026-34088?

Yes, a patch is available for CVE-2026-34088. Update the affected software to the latest version immediately.

MediaWiki CVE-2026-34088

Q: What is the CVSS score of CVE-2026-34088?

CVE-2026-34088 has a CVSS 4.0 base score of 1.3 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:U/V:X/RE:M/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-29060 LOW

Information Exposure (CWE-200)

2026-05-11 wikimedia-foundation

GHSA-wpmg-m9mx-w7pj

Information Disclosure Mediawiki

1.3

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

1.3 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:U/V:X/RE:M/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

May 11, 2026 - 18:00 vuln.today

Patch available

May 11, 2026 - 17:01 EUVD

CVSS changed

May 11, 2026 - 16:22 NVD

1.3 (LOW)

CVE Published

May 11, 2026 - 14:43 nvd

LOW 1.3

CVE Published

May 11, 2026 - 14:43 nvd

UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

MediaWiki before versions 1.43.7, 1.44.4, and 1.45.2 exposes sensitive information to unauthorized actors through a vulnerability requiring user interaction. The flaw allows information disclosure via network access without authentication, though impact is limited (CVSS 1.3) and requires user participation to trigger. Vendor-released patches are available across all affected major versions.

Technical ContextAI

MediaWiki is a free open-source wiki software platform used by Wikipedia and thousands of other sites. The vulnerability is rooted in CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), a weakness in information exposure controls. The CVSS 4.0 vector indicates network-accessible code (AV:N) with low attack complexity (AC:L), no attack timing requirements (AT:N), and no privilege requirements (PR:N), but critically requires user interaction (UI:P) to exploit. The limited confidentiality impact (VC:L) combined with no integrity or availability impact suggests the exposure is narrowly scoped, likely affecting session tokens, user-specific data, or site configuration visible only through intentional user actions.

RemediationAI

Upgrade immediately to patched versions: MediaWiki 1.43.7 or later, 1.44.4 or later, or 1.45.2 or later - choose the series matching your current deployment. For sites on 1.43.x, upgrade to 1.43.7 or migrate to a newer series. For 1.44.x, upgrade to 1.44.4 or migrate upward. For 1.45.x, upgrade to 1.45.2. Standard MediaWiki upgrade procedures apply: backup the database and LocalSettings.php, download the release, run the maintenance update script (php maintenance/update.php), and verify functionality. No workarounds or compensating controls are documented; patching is the primary mitigation. Consult https://phabricator.wikimedia.org/T410429 for technical details and confirm patch deployment before considering the issue resolved.