Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Serviceability). 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. Difficult to exploit 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 update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as 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 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).
Published: 2026-10-20
Score: 4.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized Data Modification and Read
Action: Patch Now
AI Analysis

Impact

The vulnerability is located in the Serviceability component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. It permits an unauthenticated attacker with network connectivity to invoke exposed APIs, enabling unauthorized updates, inserts, deletes, or read access to certain data managed by these products. The impact manifests as loss of data integrity and confidentiality; system availability is not directly affected.

Affected Systems

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 are affected. Oracle GraalVM for JDK versions 17.0.20.1 and 21.0.12.1, as well as Oracle GraalVM Enterprise Edition 21.3.19.1.1, remain vulnerable.

Risk and Exploitability

The CVSS 3.1 base score of 4.8 indicates moderate severity; confidentiality and integrity are downgraded to Low. The EPSS score is less than 1%, and the vulnerability is not yet listed in the CISA KEV catalog. The attacker does not require authentication or local access; exploitation can occur over multiple network protocols via the Serviceability APIs. If successful, the attacker can alter or retrieve sensitive data which could compromise business logic or expose confidential information.

Generated by OpenCVE AI on October 22, 2026 at 15:31 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the CPU Oct 2026 patch for Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition to address the Serviceability flaw.
  • Restrict or disable access to the Serviceability component on the network, for example by configuring firewalls or container security to allow only trusted hosts.
  • Enforce strict authentication and authorization on any API endpoints that interact with the Serviceability component, and ensure sandboxed Java applications do not load external code with elevated privileges.

Generated by OpenCVE AI on October 22, 2026 at 15:31 UTC.

Tracking

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

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

Type Values Removed Values Added
Title Unauthorized Data Modification and Read via Serviceability Component in Oracle Java SE and GraalVM openjdk: Enhance jstatd (Oracle CPU 2026-10)
Weaknesses CWE-749
References
Metrics threat_severity

None

 threat_severity

Moderate

Wed, 21 Oct 2026 19:15:00 +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

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 21 Oct 2026 09:45:00 +0000

Type Values Removed Values Added
Title Unauthorized Data Modification and Read via Serviceability Component in Oracle Java SE and GraalVM
Weaknesses CWE-284

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: Serviceability). 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. Difficult to exploit 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 update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as 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 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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: 2026-10-21T15:47:05.057Z

Reserved: 2026-09-14T22:10:16.630Z

Link: CVE-2026-91374

cve-icon Vulnrichment

Updated: 2026-10-21T15:46:58.457Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:40.413

Modified: 2026-10-21T18:45:11.277

Link: CVE-2026-91374

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:25:36Z

Links: CVE-2026-91374 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T15:45:08Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-749

    Exposed Dangerous Method or Function