Medium severity · published Jan 7, 2026
CVE-2026-0668
VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input
5.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MV
MediaWiki - VisualData Extension · Wikimedia Foundation
1.45 · source: vendor
VI
Visualdata · Wikisphere
All versions, or not specified · source: NVD
Affected product
MV
MediaWiki - VisualData Extension
Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0668
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0668
Patch
https://gerrit.wikimedia.org/r/q/I4ff2737c9f0ba805267d1fc8296e7cff61241ee3
Patch
https://gerrit.wikimedia.org/r/q/I893a9fca694a2613e29e149dea2d76d7f06063e5
Patch
https://gerrit.wikimedia.org/r/q/Ie08d9a8ceb2c9a22a635cfc27964353f14072dbf
Patch
https://gerrit.wikimedia.org/r/q/Ifbf9c2ade621226e14fe852f3217293772bf8bb8
Exploit
https://phabricator.wikimedia.org/T387008