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TI-2026-00762 Aliases CVE-2026-1009GHSA-fc5v-qvgj-pv25

Stored Cross-Site Scripting in Altium Live Forum Leading to Cross-Customer Data Exposure

Priority MEDIUM 40CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Security bypass, Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284 and CWE-79.

Summary

A stored cross-site scripting (XSS) vulnerability exists in the Altium Forum due to missing server-side input sanitization in forum post content. An authenticated attacker can inject arbitrary JavaScript into forum posts, which is stored and executed when other users view the affected post. Successful exploitation allows the attacker’s payload to execute in the context of the victim’s authenticated Altium 365 session, enabling unauthorized access to workspace data, including design files and workspace settings. Exploitation requires user interaction to view a malicious forum post.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00238 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
AltiumAltium Liveup to 1.2.2—No fix listedCNA
  • Altium Live VendorAltium Affected up to 1.2.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:altium:altium_live:1.2.2:*:*:*:*:*:*:*1.2.2VulnerableAltium
  • cpe:2.3:a:altium:altium_live:1.2.2:*:*:*:*:*:*:* Versions 1.2.2 Vulnerable ·Altium

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-1009
  2. 2026-10-03 Alias added: GHSA-fc5v-qvgj-pv25

References

Advisory 1

  • TI-2026-00761 Stored Cross-Site Scripting in Altium Live User Profile Fields CVSS 3.1HIGH 7.6
  • TI-2026-00764 Stored Cross-Site Scripting in Altium Live Support Center Comment Endpoint CVSS 3.1MEDIUM 6.1

Sources

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