CVE-2026-0668

VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input

5.3 Medium

Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.48%Up 0.4 points since Jan 8, 2026

What each source reports

CVE List Score used 5.3

VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input

Record: CVE-2026-0668
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-1333
Updated: 2026-11-02

EUVDEUVD-2026-1176 5.3

Record: EUVD-2026-1176
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-6p52-pvr6-5x2c 5.3

Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki -...

Record: GHSA-6p52-pvr6-5x2c
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-1333
Updated: 2026-11-02

NVD 5.3

Record: CVE-2026-0668
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-1333
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-0668 is a medium vulnerability (CVSS 5.3) in Wikimedia Foundation Mediawiki - Visualdata Extension, published January 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. No source names a fixed version.