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CVE-2026-0668

20
FAUCET Score

CVE-2026-0668 describes an Inefficient Regular Expression Complexity vulnerability within the VisualData Extension for Wikimedia Foundation's MediaWiki, affecting version 1.45. This flaw, categorized as a Regular Expression Exponential Blowup (ReDoS), could lead to a denial of service due to excessive resource consumption. With a CVSS score of 5.3 (MEDIUM), it has a low impact on availability and requires no user interaction or privileges to exploit. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:wikisphere:visualdata:-:*:*:*:*:mediawiki:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 21st percentile among its peer group of 23,703 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2026-0668Moderate

MediaWiki: MediaWiki VisualData Extension: Denial of Service via inefficient regular expression

Jan 7, 2026

References

gerrit.wikimedia.org / r/q/I4ff2737c9f0ba805267d1fc8296e7cff61241ee3
Patch
gerrit.wikimedia.org / r/q/I893a9fca694a2613e29e149dea2d76d7f06063e5
Patch
gerrit.wikimedia.org / r/q/Ie08d9a8ceb2c9a22a635cfc27964353f14072dbf
Patch
gerrit.wikimedia.org / r/q/Ifbf9c2ade621226e14fe852f3217293772bf8bb8
Patch
phabricator.wikimedia.org / T387008
ExploitIssue Tracking