REDHAT-BUG-2557506: Medium severity Oracle Java SE vulnerability

Published Oct 21, 2026
·
Updated

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JAAS). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Affected Software

3 affected components
Oracle Java SE=8u503, =8u503-perf, =11.0.32.1, =17.0.20.1, =21.0.12.1, =25.0.4.1, =27
Oracle GraalVM for JDK=17.0.20.1, =21.0.12.1
Oracle GraalVM Enterprise Edition=21.3.19.1.1

Event History

Oct 21, 2026
Data Sourced
via Red Hat·12:12 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

Which deployments are most exposed to this issue?

Network-reachable applications that pass attacker-controlled data to JAAS APIs, such as web services, are exposed. Client deployments are also affected when they run untrusted code in sandboxed Java Web Start applications or sandboxed Java applets and rely on the Java sandbox for security.

2

What access does an attacker need to exploit the vulnerability?

An attacker can be unauthenticated and needs network access through one of multiple protocols. Exploitation can occur through APIs in the affected component when an application supplies attacker-controlled data to those APIs.

3

What is the potential impact of a successful attack?

A successful attack can provide unauthorized read access to a subset of data accessible to the affected Oracle Java SE or GraalVM deployment.

4

Which affected product versions are identified?

Affected Oracle Java SE versions are 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, and 27. Affected Oracle GraalVM for JDK versions are 17.0.20.1 and 21.0.12.1, and affected Oracle GraalVM Enterprise Edition is 21.3.19.1.1.

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