What is the CVSS score of CVE-2026-0668?

CVE-2026-0668 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.1%.

Which versions of Mediawiki are affected by CVE-2026-0668?

CVE-2026-0668 presents moderate security risk rated CVSS 5.3. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available.. A patch is available.

Is there a public PoC exploit available for CVE-2026-0668?

Yes, a public proof-of-concept exploit is available for CVE-2026-0668. Prioritise patching immediately. EPSS: 0.1%.

Mediawiki CVE-2026-0668

MEDIUM

Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)

2026-01-07 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Mediawiki Visualdata Red Hat

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

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

Red Hat

6.5 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 24, 2026 - 18:32 vuln.today

Public exploit code

Patch released

Feb 24, 2026 - 18:32 nvd

Patch available

CVE Published

Jan 07, 2026 - 18:15 nvd

MEDIUM 5.3

DescriptionCVE.org

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

AnalysisAI

Visualdata versions up to - is affected by inefficient regular expression complexity (redos) (CVSS 5.3).

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Vulnerability AssessmentAI

Risk Assessment	CVSS 5.3 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

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Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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Vendor StatusVendor

CVE-2026-0668 vulnerability details – vuln.today

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Mediawiki CVE-2026-0668

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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External POC / Exploit Code