Vulnerability · Published Oct 3, 2026 · Assigned by VulnCheck

CVE-2026-105120OpenAM before 16.1.3 Cross-Realm Session Disclosure via Sessions REST Endpoint

Medium 4.9

In plain English

A medium-severity information exposure in OpenAM from OpenIdentityPlatform. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium

Exploit odds (30 days)0.3%top 81.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
OpenIdentityPlatform	OpenAM	0 – before 16.1.3
OpenIdentityPlatform	OpenAM	0 – before 16.1.3

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-x8cj-3hqv-cgwh) vendor-advisory
VulnCheck Advisory: OpenAM before 16.1.3 Cross-Realm Session Disclosure via Sessions REST Endpoint third-party-advisory