CVE-2026-0668 json
VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input
published 10mo ago modified 14d ago also EUVD-2026-1176
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
Summary
Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.
Patch / fix
Is CVE-2026-0668 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerVendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-0668 updated cvss 6.5
MediaWiki: MediaWiki VisualData Extension: Denial of Service via inefficient regular expression
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 10mo ago
Exploit prediction
0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- phabricator.wikimedia.org https://phabricator.wikimedia.org/T387008 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
Affected products
- Wikimedia Foundation MediaWiki - VisualData Extension
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
gerrit.wikimedia.org
/r/q/Ie08d9a8ceb2c9a22a635cfc27964353f14072dbf
patch
-
gerrit.wikimedia.org
/r/q/Ifbf9c2ade621226e14fe852f3217293772bf8bb8
patch
-
gerrit.wikimedia.org
/r/q/I893a9fca694a2613e29e149dea2d76d7f06063e5
patch
-
gerrit.wikimedia.org
/r/q/I4ff2737c9f0ba805267d1fc8296e7cff61241ee3
patch
-
phabricator.wikimedia.org
/T387008
exploit, issue-tracking
Sources
- CVE List CVE-2026-0668
- NVD CVE-2026-0668
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.