CVE-2026-91403

Name of the Vulnerable Software and Affected Versions Oracle Java SE versions 8u511, 8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5, 27.0.1 Oracle GraalVM for JDK versions 17.0.21, 21.0.13 Oracle GraalVM Enterprise Edition version 21.3.20

Description An issue exists in the JSSE component that allows an unauthenticated attacker with network access via multiple protocols to compromise the system. This can lead to unauthorized access, creation, deletion, or modification of critical data. The issue can be exploited through APIs in the affected component, such as via a web service providing data to those APIs. It also impacts Java deployments that load and run untrusted code, such as sandboxed Java Web Start applications or sandboxed Java applets, which rely on the Java sandbox for security.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.