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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (37.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- MediaWiki — versions 1.45.0
- Wikimedia Foundation MediaWiki - Visualdata Extension — versions 1.45
- Wikisphere Visualdata
Weakness classification (CWE)
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.