CVE-2026-91380
Received Received - Intake

Memory Corruption in Oracle Java SE

Publication date: 2026-10-20

Last updated on: 2026-10-21

Assigner: Oracle

Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Utility). 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 logon to the infrastructure where Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition executes 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 4.0 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-20
Last Modified
2026-10-21
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-91380
EUVD
EUVD-2026-106634

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a vulnerability in Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition affecting multiple versions. It allows an unauthenticated attacker with local access to compromise the system through the Utility component. Successful exploitation could lead to unauthorized data access, modification, or deletion.

Detection Guidance

Detection involves checking installed versions of Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition against affected versions. Use commands like 'java -version' or 'gu --version' to identify installed versions. Compare these against the vulnerable versions listed in the CVE description.

Impact Analysis

If you use affected versions of Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition, an attacker with local access could read, modify, or delete some of your Java-related data. This is especially risky for systems running untrusted Java code from the internet.

Compliance Impact

This vulnerability allows unauthorized read, update, insert, or delete access to some Oracle Java SE data, which could lead to exposure or manipulation of sensitive information. This may impact compliance with GDPR (data confidentiality requirements) and HIPAA (protected health information integrity).

Mitigation Strategies

Apply the latest patches or updates from Oracle to upgrade to a non-vulnerable version. Remove or disable any sandboxed Java applications running untrusted code. Restrict access to APIs in the affected component and monitor for unusual data access patterns.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-91380. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...