Description
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).
Published: 2026-10-20
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Apply Patch
AI Analysis

Impact

Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition contain a flaw in the JAAS component that allows an unauthenticated attacker to read a subset of data exposed through APIs. The vulnerability does not appear to require privilege escalation or user interaction; once accessed, the confidentiality of the read data is compromised, potentially exposing sensitive information that was intended to be protected by the Java sandbox or authentication controls.

Affected Systems

The flaw affects Oracle Java SE versions 8u503, 8u503‑perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, and 27, as well as Oracle GraalVM for JDK versions 17.0.20.1 and 21.0.12.1, and Oracle GraalVM Enterprise Edition 21.3.19.1. These include desktop and server builds deployed across diverse environments, including sandboxed Java Web Start applications and Java applets that load untrusted code.

Risk and Exploitability

The CVSS 3.1 base score of 5.3 indicates a moderate confidentiality impact. The EPSS score indicates a probability of exploitation of less than 1%, and the vulnerability is not listed in the CISA KEV catalog, suggesting that no confirmed exploitation has yet been reported. Attackers can reach the affected APIs over the network via multiple protocols; based on the description, the attack vector appears to be open to the network and does not require additional privileges, putting organizations with exposed API endpoints at a higher risk.

Generated by OpenCVE AI on October 28, 2026 at 00:28 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the security update announced in the Oracle advisory for the affected Java and GraalVM releases.
  • Limit network reachability to the APIs that expose sensitive data, using firewalls or subnet segmentation.
  • Enforce authentication and authorization on all exposed API endpoints wherever possible.
  • Enable or verify that the Java sandbox policies are applied to untrusted code, especially for client‑side applets and Web Start applications.
  • Monitor application logs for anomalous read requests and investigate any unauthorized data access incidents.

Generated by OpenCVE AI on October 28, 2026 at 00:28 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4861-1 openjdk-17 security update
History

Tue, 10 Nov 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Oracle graalvm Enterprise Edition
Oracle oracle Java Se
Vendors & Products Oracle graalvm Enterprise Edition
Oracle oracle Java Se

Tue, 27 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 22 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200

Thu, 22 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Title Unauthenticated API Read Access in Oracle Java SE and GraalVM openjdk: Enhance LDAP logins (Oracle CPU 2026-10)
Weaknesses CWE-90
References
Metrics threat_severity

None

 threat_severity

Moderate

Wed, 21 Oct 2026 07:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated API Read Access in Oracle Java SE and GraalVM
Weaknesses CWE-200

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description 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).
First Time appeared Oracle
Oracle graalvm
Oracle graalvm For Jdk
Oracle java Se
CPEs cpe:2.3:a:oracle:graalvm:21.3.19.1.1:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:17.0.20.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:21.0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:11.0.32.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:17.0.20.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:21.0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:25.0.4.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:27:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:8u503:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:8u503:*:*:*:enterprise_performance:*:*:*
Vendors & Products Oracle
Oracle graalvm
Oracle graalvm For Jdk
Oracle java Se
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Subscriptions

Oracle Graalvm Graalvm Enterprise Edition Graalvm For Jdk Java Se Oracle Java Se
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-27T13:39:42.444Z

Reserved: 2026-08-31T15:40:57.356Z

Link: CVE-2026-83380

cve-icon Vulnrichment

Updated: 2026-10-27T13:39:24.815Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:19:54.270

Modified: 2026-10-27T14:17:02.777

Link: CVE-2026-83380

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:23:38Z

Links: CVE-2026-83380 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-11-10T08:45:15Z

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

  • CWE-90

    Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')