Wikimedia VisualData Extension 1.45 on MediaWiki redos

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Wikimedia VisualData Extension 1.45 on MediaWiki. Affected by this vulnerability is an unknown functionality. Such manipulation leads to redos. This vulnerability is traded as CVE-2026-0668. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Wikimedia VisualData Extension 1.45 on MediaWiki and classified as problematic. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. CVE summarizes:

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

The weakness was shared by Radman Siddiki. The advisory is shared for download at phabricator.wikimedia.org. This vulnerability is handled as CVE-2026-0668 since 01/07/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1449.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0035). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source MediaWiki

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 5.3
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/07/2026 Advisory disclosed
01/07/2026 +0 days CVE reserved
01/07/2026 +0 days VulDB entry created
02/26/2026 +50 days VulDB entry last update

Sourcesinfo

Advisory: phabricator.wikimedia.org
Researcher: Radman Siddiki
Status: Confirmed

CVE: CVE-2026-0668 (🔒)
GCVE (CVE): GCVE-0-2026-0668
GCVE (VulDB): GCVE-100-339944
CERT Bund: WID-SEC-2026-0035 - MediaWiki Erweiterungen: Mehrere Schwachstellen

Entryinfo

Created: 01/07/2026 22:24
Updated: 02/26/2026 11:28
Changes: 01/07/2026 22:24 (55), 01/08/2026 19:11 (7), 02/26/2026 11:28 (11)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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