CVE-2026-105120 OpenAM before 16.1.3 Cross-Realm Session Disclosure via Sessions REST Endpoint
Realm administrators can bypass tenant boundaries to disclose session data from other realms via the sessions REST endpoint.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105120?
CVE-2026-105120 is a medium-severity missing authorization vulnerability in OpenIdentityPlatform OpenAM, published on 3 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
OpenAM before 16.1.3 contains an authorization bypass vulnerability in the sessions REST endpoint query operation that allows realm administrators to list sessions of every realm. Attackers holding delegated RealmAdmin privileges can supply a _queryFilter naming another realm to disclose usernames, universal IDs, and session handles across tenant boundaries.
Weakness: CWE-200
Which versions are affected by CVE-2026-105120?
How do I fix CVE-2026-105120?
No fix has been published for CVE-2026-105120 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-2026-105120 being exploited?
There is no known exploitation of CVE-2026-105120 in the wild and no public exploit code.
Sources
Also known as GHSA-55ch-4xvx-7w9q, GHSA-x8cj-3hqv-cgwh.