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TI-2026-09864 Aliases CVE-2026-11431GHSA-96xj-rmhf-c584

Path Traversal in Altium Projects Service Allows Arbitrary File Read

Priority MEDIUM 43CWE-200Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

A path traversal vulnerability exists in the Projects Service download endpoint shared by Altium Enterprise Server and Altium 365. An authenticated user can supply a crafted path parameter that bypasses validation, allowing arbitrary files (including entire directories returned as archives) to be read from the server filesystem. Because the readable files include service configuration and credential material, exploitation can be used to gather information enabling further compromise. The issue can be combined with CVE-2026-11424 to reach the cloud-side endpoint. On multi-tenant Altium 365 deployments, the readable configuration could have exposed credentials shared across services. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00517 44th percentileScored 2026-11-07
Fix Fixed Altium Enterprise Server (Altium): 8.1.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
AltiumAltium Enterprise Serverbefore 8.1.18.1.1Patch availableCNA
AltiumAltium 365all versions—No fix listedCNA
  • Altium Enterprise Server VendorAltium Affected before 8.1.1 Fixed in 8.1.1 Patch available CNA
  • Altium 365 VendorAltium Affected all versions Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:altium:on-prem_enterprise_server:*:*:*:*:*:*:*:*——Altium
  • cpe:2.3:a:altium:on-prem_enterprise_server:*:*:*:*:*:*:*:* Versions — — ·Altium

Remediation

  • Fix · CNA Altium Enterprise Server (Altium) Fixed in 8.1.1

Fixed in the same release

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

  • Release ·

    Altium Enterprise Server 8.1.1

    7 records Highest priority Priority MEDIUM 6 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-09862 Path Traversal in Altium Vault ScriptsController Allows Unauthenticated Remote Code ExecutionPriority MEDIUM 51
    • TI-2026-09855 Path Traversal in Altium Enterprise Server NIS Allows Unauthenticated Arbitrary File Write and File ReadPriority MEDIUM 50
    • TI-2026-09854 Path Traversal in Altium Enterprise Server Vault UploadController Allows Arbitrary File WritePriority MEDIUM 49
    Show all 7 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11431
  2. 2026-10-03 Alias added: GHSA-96xj-rmhf-c584

References

Other 1

  • TI-2026-09862 Path Traversal in Altium Vault ScriptsController Allows Unauthenticated Remote Code Execution CVSS 4.0CRITICAL 10.0
  • TI-2026-62547 Server-Side Request Forgery in Altium Enterprise Server UnifiedLogin Service Allows Unauthenticated System Compromise CVSS 4.0CRITICAL 10.0
  • TI-2026-09855 Path Traversal in Altium Enterprise Server NIS Allows Unauthenticated Arbitrary File Write and File Read CVSS 4.0CRITICAL 10.0
  • TI-2026-09854 Path Traversal in Altium Enterprise Server Vault UploadController Allows Arbitrary File Write CVSS 4.0CRITICAL 9.4
  • TI-2026-09851 Path traversal in Altium Enterprise Server CVSS 4.0CRITICAL 10.0
  • TI-2026-08047 Unauthenticated SOAP Endpoint in Altium 365 SearchService Allows Cross-Tenant Data Exfiltration and Index Destruction CVSS 4.0CRITICAL 10.0
See all 21 →

Sources

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