Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JGSS). 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 creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.9 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N).
Published: 2026-10-20
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Integrity Compromise
Action: Apply Patch
AI Analysis

Impact

The vulnerability resides in the Java GSS-API component (JGSS) of Oracle Java SE and its GraalVM derivatives. An unauthenticated attacker who can reach the affected APIs over multiple network protocols can manipulate data by creating, deleting, or modifying critical records. The attack does not provide code execution but can alter system state or application data, resulting in a loss of integrity. The weakness involves improper access control, enabling unauthorized operations on protected resources.

Affected Systems

Affected vendors include Oracle Corporation with its Java SE product line and GraalVM for JDK and GraalVM Enterprise Edition. The CVE lists specific affected releases: Java SE 8u503, 8u503‑perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27, GraalVM for JDK 17.0.20.1, 21.0.12.1, and GraalVM Enterprise Edition 21.3.19.1.1.

Risk and Exploitability

The CVSS v3.1 base score is 5.9, indicating a moderate risk with an integrity impact. The EPSS score of < 1% indicates a very low exploitation probability, but it remains a risk; the vulnerability is not listed in the CISA KEV catalog. The attack vector is network‑based, requiring the attacker to send crafted data to the JGSS APIs over the supported protocols; no user interaction is required. This means that any system exposing these APIs to untrusted networks could be compromised by an unauthenticated attacker.

Generated by OpenCVE AI on October 24, 2026 at 04:51 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition to the latest patched versions as detailed in Oracle’s security advisory.
  • Use firewall or network segmentation to block or restrict network access to the JGSS APIs over the identified protocols from untrusted hosts.
  • Disable or sandbox the JGSS APIs if they are not required, or limit their usage to trusted internal applications only.

Generated by OpenCVE AI on October 24, 2026 at 04:51 UTC.

Tracking

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

Sat, 24 Oct 2026 03:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
Metrics ssvc

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

Thu, 22 Oct 2026 17:30:00 +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

Thu, 22 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

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

Type Values Removed Values Added
Title Unauthenticated Integrity Compromise via Oracle JGSS APIs in Java SE & GraalVM openjdk: Enhance krb5 tokens (Oracle CPU 2026-10)
Weaknesses CWE-354
References
Metrics threat_severity

None

 threat_severity

Moderate

Wed, 21 Oct 2026 10:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Integrity Compromise via Oracle JGSS APIs in Java SE & 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: JGSS). 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 creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.9 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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: 2026-10-24T03:05:38.266Z

Reserved: 2026-09-14T22:10:16.636Z

Link: CVE-2026-91462

cve-icon Vulnrichment

Updated: 2026-10-24T03:05:32.695Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:49.857

Modified: 2026-10-24T04:18:22.037

Link: CVE-2026-91462

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:26:06Z

Links: CVE-2026-91462 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-24T05:00:19Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-354

    Improper Validation of Integrity Check Value