Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). 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 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 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).
Published: 2026-10-20
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized Data Modification
Action: Immediate Patch
AI Analysis

Impact

This vulnerability is caused by improper certificate name checks in the security component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. An unauthenticated attacker who can reach networked APIs can supply crafted requests that bypass standard certificate validation, allowing the attacker to read, insert, update, or delete protected data. Because the flaw stems from certificate validation rather than access control, it permits unauthorized manipulation of data accessed by these runtimes.

Affected Systems

This vulnerability impacts Oracle Corporation products Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. In Oracle Java SE, the affected releases are 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, and 27. Oracle GraalVM for JDK versions 17.0.20.1 and 21.0.12.1, and Oracle GraalVM Enterprise Edition release 21.3.19.1.1 are also impacted.

Risk and Exploitability

The CVSS 3.1 base score of 6.5 indicates moderate severity. The EPSS score is below 1% and the vulnerability is not listed in CISA KEV. The attack vector is likely via remote network access to any exposed API endpoints. Because the flaw allows unauthenticated data tampering and reads, it poses a significant risk for any organization that promotes client‑side or web‑service interactions with these Java runtimes. The attacker needs only network connectivity to trigger the exploit.

Generated by OpenCVE AI on October 28, 2026 at 00:23 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the vendor‑issued security patch for the affected Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition releases listed above.
  • Regulate or block network access to the exposed APIs that the flaw relies on, using firewall rules or service‑level access controls to limit exposure to trusted hosts.
  • Enable strict authentication and authorization checks on all API endpoints, ensuring that only privileged users can perform write operations and that read permissions are limited to necessary data ranges.

Generated by OpenCVE AI on October 28, 2026 at 00:23 UTC.

Tracking

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

Tue, 27 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Tue, 27 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Thu, 22 Oct 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

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

Type Values Removed Values Added
Title Unauthenticated Network API Attack Allows Unauthorized Data Modification in Oracle Java SE and GraalVM openjdk: Enhance Certificate Name Checks (Oracle CPU 2026-10)
Weaknesses CWE-295
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 22 Oct 2026 08:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated Network API Attack Allows Unauthorized Data Modification in Oracle Java SE and GraalVM
Weaknesses CWE-284

Wed, 21 Oct 2026 11:30:00 +0000

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

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: Security). 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 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 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/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': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

Subscriptions

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

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-27T19:00:47.038Z

Reserved: 2026-09-08T21:49:12.409Z

Link: CVE-2026-87294

cve-icon Vulnrichment

Updated: 2026-10-27T19:00:33.312Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:06.387

Modified: 2026-10-27T19:17:31.480

Link: CVE-2026-87294

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:23:52Z

Links: CVE-2026-87294 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T00:30:14Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-295

    Improper Certificate Validation