Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18. 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 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 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 7.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).
Published: 2026-07-21
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

CVE-2026-47063 is a vulnerability in the libraries component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition that allows an unauthenticated attacker with network access to create, delete, or modify critical data by exploiting unsafe jar handling. The weakness is modeled by CWE-347 and results in a high integrity impact without affecting confidentiality or availability. The vulnerability can be triggered through exposed APIs that load JAR files, including web services and sandboxed Java client applications that download code from the internet.

Affected Systems

Affected products include Oracle Java SE up to versions 8u491, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1, and 8u491-perf; Oracle GraalVM for JDK 17.0.19 and 21.0.11; and Oracle GraalVM Enterprise Edition 21.3.18. Any system that hosts or runs Java applications using these components and exposes the vulnerable APIs to a network is susceptible.

Risk and Exploitability

The CVSS 3.1 base score of 7.5 indicates a moderate to high risk, while the EPSS score of less than 1% suggests that, so far, few exploits have been observed. The vulnerability is not listed in the CISA KEV catalog, but it is still considered easily exploitable for remote attackers. An unauthenticated attacker can send crafted requests over the network to any service that processes JAR files or invokes the vulnerable API, thereby achieving unauthorized changes to application data.

Generated by OpenCVE AI on August 2, 2026 at 23:47 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Oracle CPU Jul 2026 security update for the affected Java SE, GraalVM for JDK, or GraalVM Enterprise Edition release
  • Block or restrict network exposure of services that load JAR files from untrusted sources
  • Ensure Java applications are deployed using the latest non‑affected releases and enforce sandbox or security managers for Web Start or applet usage

Generated by OpenCVE AI on August 2, 2026 at 23:47 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4702-1 openjdk-11 security update
Debian DLA Debian DLA DLA-4703-1 openjdk-17 security update
Debian DSA Debian DSA DSA-6425-1 openjdk-21 security update
History

Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
Metrics ssvc

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

Wed, 22 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
Title openjdk: OpenJDK: Enhance Jar handling (Oracle CPU 2026-07)
Weaknesses CWE-347
References
Metrics threat_severity

None

 threat_severity

Important

Tue, 21 Jul 2026 21:45:00 +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: Libraries). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18. 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 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 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 7.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/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:21.3.18:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:17.0.19:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:21.0.11:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:11.0.31:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:17.0.19:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:21.0.11:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:25.0.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:26.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:8u491:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:8u491:*:*:*:enterprise_performance:*:*:*
Vendors & Products Oracle
Oracle graalvm
Oracle graalvm For Jdk
Oracle java Se
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

Subscriptions

Oracle Graalvm Graalvm For Jdk Java Se
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-07-23T17:06:07.880Z

Reserved: 2026-05-18T15:55:10.319Z

Link: CVE-2026-47063

cve-icon Vulnrichment

Updated: 2026-07-23T16:54:18.920Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-21T20:00:00Z

Links: CVE-2026-47063 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T00:00:04Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-347

    Improper Verification of Cryptographic Signature