CVE-2026-0668: Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extensi

This week

MEDIUM 5.3REMOTEMITIGATE

CVE-2026-0668 is a medium-severity flaw (CVSS 5.3) affecting visualdata. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-1333
Published	2026-01-07
Last modified	2026-10-26

Publisher (CNA): wikimedia-foundation · Vendor: wikisphere

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-07 18:15 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

wikisphere visualdata MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy visualdata || rpm -q visualdata || visualdata --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-0668?

visualdata: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-0668 being exploited?

CVE-2026-0668 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-0668 affect?

CVE-2026-0668 affects visualdata. Severity is medium (CVSS 5.3). Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.

How urgent is CVE-2026-0668?

Priority 39/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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