CVE-2026-9152 Unauthenticated SOAP Endpoint in Altium 365 SearchService Allows Cross-Tenant Data Exfiltration and Index Destruction
Unauthenticated attackers can read and modify search index data across tenants in Altium 365, exposing sensitive workspace information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9152?
CVE-2026-9152 is a critical missing authorization vulnerability in Altium 365, published on 21 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A missing authentication vulnerability exists in the Altium 365 SearchService. A legacy SOAP endpoint exposes search index operations without requiring authentication, session tokens, or any form of identity verification. An unauthenticated network attacker who can reference a target workspace's identifier can interact with that workspace's search index, crossing tenant boundaries.
Successful exploitation allows reading a workspace's indexed contents (such as component data, project and folder names, and user metadata) and injecting, modifying, or deleting search index entries. These operations affect the search index only, not the underlying vault data, but they can disclose sensitive workspace information and compromise the integrity and availability of search results. Altium 365 cloud deployments are affected; on-premise Altium Enterprise Server is not affected.
Which versions are affected by CVE-2026-9152?
How do I fix CVE-2026-9152?
No fix has been published for CVE-2026-9152 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-9152 being exploited?
There is no known exploitation of CVE-2026-9152 in the wild and no public exploit code.
Sources
Also known as GHSA-g63v-r3mf-m22g.