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TI-2026-41789 Aliases CVE-2026-58034GHSA-5m8f-rxqc-4gpj

Stored XSS through a system message when blocking a temporary account that's related to other temporary accounts

Priority LOW 3CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Active
Attack complexity
Low
Attack requirements
Present
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/blockConnectedTempAccountsField.Vue. This issue affects CheckUser: from 1.46.0-rc.0 before 1.46.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Fix Fixed CheckUser (Wikimedia Foundation): 1.46.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Wikimedia FoundationCheckUser1.46.0-rc.0 to before 1.46.01.46.0Patch availableCNA
  • CheckUser VendorWikimedia Foundation Affected 1.46.0-rc.0 to before 1.46.0 Fixed in 1.46.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mediawiki:mediawiki:1.46.0:rc0:*:*:*:*:*:*1.46.0 rc0Vulnerablemediawiki
  • cpe:2.3:a:mediawiki:mediawiki:1.46.0:rc0:*:*:*:*:*:* Versions 1.46.0 rc0 Vulnerable ·mediawiki

Remediation

  • Fix · CNA CheckUser (Wikimedia Foundation) Fixed in 1.46.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58034
  2. 2026-10-03 Alias added: GHSA-5m8f-rxqc-4gpj

References

Other 1

  • TI-2025-11006 The compare API module breaks Extension:Lockdown CVSS 4.0CRITICAL 10.0
  • TI-2024-32110 Backticks can allow the usage of not-allowed SQL functions CVSS 4.0HIGH 8.8
  • TI-2026-65500 Unauthenticated SQL injection in UserPageViewTracker via filterusers and ignoreusers parameters CVSS 3.1HIGH 7.5
  • TI-2026-64588 DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memory exhaustion) CVSS 3.1HIGH 7.5
  • TI-2026-42112 SQLi in Cargo extension via year range filter CVSS 4.0MEDIUM 6.9
  • TI-2026-42110 Stored XSS through Cargo's map format CVSS 4.0MEDIUM 6.9
See all 255 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences