What is CVE-2026-0668?

CVE-2026-0668 is a medium-severity vulnerability in Mediawiki, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2026-01-07.

How severe is CVE-2026-0668?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Mediawiki

CVE-2026-0668

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

Vulnerability class: ReDoS (Regular Expression Denial of Service)

EPSS: 0.004 (33.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Mediawiki — versions 1.45.0
Wikimedia Foundation Mediawiki - Visualdata Extension — versions 1.45
Wikisphere Visualdata

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Exploit, Issue Tracking)
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Patch)
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Patch)
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Patch)
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Patch)

Frequently asked questions

What is CVE-2026-0668?: CVE-2026-0668 is a medium-severity vulnerability in Mediawiki, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2026-01-07.
How severe is CVE-2026-0668?: Medium severity. CVSS v3 base score is 5.3 out of 10.