Vulnerability · Published Jan 7, 2026 · Assigned by wikimedia-foundation
CVE-2026-0668VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input
Medium 5.3
In plain English
A medium-severity regular-expression denial of service in MediaWiki - VisualData Extension from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 58.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wikimedia Foundation | MediaWiki - VisualData Extension | 1.45 |
Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://phabricator.wikimedia.org/T387008
- https://gerrit.wikimedia.org/r/q/Ie08d9a8ceb2c9a22a635cfc27964353f14072dbf
- https://gerrit.wikimedia.org/r/q/Ifbf9c2ade621226e14fe852f3217293772bf8bb8
- https://gerrit.wikimedia.org/r/q/I893a9fca694a2613e29e149dea2d76d7f06063e5
- https://gerrit.wikimedia.org/r/q/I4ff2737c9f0ba805267d1fc8296e7cff61241ee3