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TI-2026-65874 Aliases CVE-2026-82042GHSA-phx4-fx7q-vfw9

UTMStack < 11.2.16 Authentication Bypass via InternalApiKeyFilter

Priority MEDIUM 49CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

UTMStack before 11.2.16 contains an authentication bypass vulnerability that allows remote attackers to gain full administrative API access by presenting a valid Utm-Internal-Key header matching the INTERNAL_KEY environment variable value, which the InternalApiKeyFilter accepts for any endpoint without path restriction, constant-time comparison, rate limiting, or audit logging. Attackers who obtain the key value can authenticate without a user account or JWT to create accounts, manage users, exfiltrate data, and modify security rules.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00546 46th percentileScored 2026-11-07
Fix Fixed UTMStack (UTMStack): 11.2.16

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
UTMStackUTMStackbefore 11.2.1611.2.16Patch availableCNA
  • UTMStack VendorUTMStack Affected before 11.2.16 Fixed in 11.2.16 Patch available CNA

Remediation

  • Fix · CNA UTMStack (UTMStack) Fixed in 11.2.16

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    UTMStack 11.2.16

    7 records Highest priority Priority MEDIUM 2 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-65871 UTMStack < 11.2.16 SQL Injection via searchGroupsByFilterPriority MEDIUM 40
    • TI-2026-65875 UTMStack < 11.2.16 Account Enumeration via Password Reset EndpointPriority LOW 36
    • TI-2026-65877 UTMStack < 11.2.16 JPQL Injection via searchPropertyValuesPriority LOW 31
    Show all 7 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82042
  2. 2026-10-03 Alias added: GHSA-phx4-fx7q-vfw9
  3. 2026-10-05 CISA SSVC decision points changed

References

Patch 1

Other 1

  • TI-2026-65871 UTMStack < 11.2.16 SQL Injection via searchGroupsByFilter CVSS 4.0HIGH 8.7
  • TI-2026-65875 UTMStack < 11.2.16 Account Enumeration via Password Reset Endpoint CVSS 4.0MEDIUM 6.9
  • TI-2026-65877 UTMStack < 11.2.16 JPQL Injection via searchPropertyValues CVSS 4.0HIGH 7.1
  • TI-2026-65873 UTMStack < 11.2.16 Missing Authorization via Command WebSocket CVSS 4.0MEDIUM 6.5
  • TI-2026-65876 UTMStack < 11.2.16 Server-Side Request Forgery via downloadPdf CVSS 4.0MEDIUM 6.3
  • TI-2026-65872 UTMStack < 11.2.16 SSRF via IdentityProviderService CVSS 4.0MEDIUM 5.3

Sources

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