Description
Vulnerability in Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 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 executes to compromise Oracle Java SE. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE 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 4.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N).
Published: 2026-10-20
Score: 4.7 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized data modification
Action: Apply Patch
AI Analysis

Impact

The vulnerability lies within the Libraries component of Oracle Java SE and permits an unauthenticated attacker who has access to the infrastructure where Java SE runs to compromise the Java runtime environment. Exploitation requires the involvement of a different human user, and after successful exploitation the attacker could create, delete, or alter critical data accessible to the Java SE installation.

Affected Systems

Oracle Corporation’s Java SE product, including the 8u503‑perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, and 27 releases, is affected. The same vulnerability extends to Oracle GraalVM JDK for the 17.0.20.1 and 21.0.12.1 builds and to Oracle GraalVM Enterprise Edition 21.3.19.1.1. Additionally, any deployment that relies on the Java sandbox—such as sandboxed Java Web Start applications or applets that load untrusted code—can be impacted.

Risk and Exploitability

The CVSS 3.1 base score of 4.7 indicates a moderate integrity impact, with local availability (AV:L) and high attack complexity (AC:H). Exploitation necessitates user interaction and access to local infrastructure, which lowers the probability of a large‑scale breach. The EPSS score is < 1% and the vulnerability is not listed in the CISA KEV catalog, further suggesting that widespread exploitation has not been observed. Nonetheless, because the consequence includes unauthorized modification of critical data, organizations with exposed Java SE installations should treat this as a priority to remediate.

Generated by OpenCVE AI on October 22, 2026 at 16:27 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the most recent Oracle Java SE patch that addresses this vulnerability (for all affected releases).
  • Upgrade Oracle GraalVM JDK and GraalVM Enterprise Edition to versions that contain the fix.
  • Disable or eliminate the use of Java Web Start or applet functionality that loads untrusted code, and enforce strict access controls so that only trusted administrators can run Java SE components.
  • Restrict local users and process privileges on systems that run Java SE to the minimum required to perform their duties.

Generated by OpenCVE AI on October 22, 2026 at 16:27 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 openjdk: Enhance jmod handling (Oracle CPU 2026-10)
Weaknesses CWE-22
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 22 Oct 2026 10:15:00 +0000

Type Values Removed Values Added
Title Local Exploit Enables Unauthorized Java SE Data Modification

Thu, 22 Oct 2026 08:15:00 +0000

Type Values Removed Values Added
Title Local Exploit Enables Unauthorized Java SE Data Modification
Weaknesses CWE-284

Thu, 22 Oct 2026 01:00:00 +0000

Type Values Removed Values Added
Title Access Control Bypass in Oracle Java SE Libraries Enables Unauthorized Data Modification

Wed, 21 Oct 2026 19:15:00 +0000

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

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

Type Values Removed Values Added
Weaknesses CWE-863
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 Access Control Bypass in Oracle Java SE Libraries Enables Unauthorized Data Modification
Weaknesses CWE-284

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

Type Values Removed Values Added
Description Vulnerability in Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 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 executes to compromise Oracle Java SE. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE 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 4.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N).
First Time appeared Oracle
Oracle java Se
CPEs 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:*:*:*:enterprise_performance:*:*:*
Vendors & Products Oracle
Oracle java Se
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N'}

Subscriptions

Oracle Java Se Oracle Java Se
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-21T15:30:13.216Z

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

Link: CVE-2026-91375

cve-icon Vulnrichment

Updated: 2026-10-21T15:30:05.520Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:40.537

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

Link: CVE-2026-91375

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:25:37Z

Links: CVE-2026-91375 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T16:30:08Z

Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

  • CWE-863

    Incorrect Authorization