CVE-2026-123184 Incorrect Authorization in Altium 365 Git Service Allows Unauthorized Repository Writes
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-123184?
CVE-2026-123184 is a high-severity vulnerability in Altium 365, published on 5 Nov 2026.
Official description
An incorrect authorization vulnerability exists in the Altium 365 Git Service. The permission check performed when a user pushes to a project repository did not correctly evaluate the required access level, so the check passed for any user holding any level of access to the project. As a result, an authenticated user with view-only access to a project could write to that project's git repository.
Read access was evaluated correctly and was not affected, and exploitation requires an authenticated account with existing access to the target project. The issue has been remediated in Altium 365 at the service level and no customer action is required. On-premise Altium Enterprise Server is not affected.
Which versions are affected by CVE-2026-123184?
How do I fix CVE-2026-123184?
No fix has been published for CVE-2026-123184 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-123184 being exploited?
There is no known exploitation of CVE-2026-123184 in the wild and no public exploit code.
Sources
Also known as GHSA-2fff-cjw5-9mmr.