# CVE-2026-47063: Oracle Java SE and GraalVM integrity vulnerability in Libraries

Source: https://junglewise.ai/threats/cve-2026-47063-oracle-java-se-and-graalvm-integrity-vulnerability-in-libraries  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-21. Updated: 2026-07-21  
License: CC BY 4.0 with a link back

CVE-2026-47063 · Severity: high · CVSS 7.5 · Published 2026-07-21

A vulnerability exists in the core libraries of Oracle Java SE and GraalVM, which are widely used to run enterprise applications and web services. An attacker could exploit this flaw over a network to modify or delete critical data without needing a username or password. This could lead to data corruption or unauthorized changes to business-critical information managed by Java-based systems.

Technologies: [Oracle GraalVM Enterprise Edition](https://junglewise.ai/threats/technologies/graalvm-enterprise-edition), [Oracle Graalvm For Jdk](https://junglewise.ai/threats/technologies/graalvm-for-jdk), [Oracle Java SE](https://junglewise.ai/threats/technologies/java-se). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-47063 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47063 being exploited in the wild.

**How severe is CVE-2026-47063?** High severity, with a CVSS score of 7.5, published 21 July 2026.

**Which products and versions are affected?** Oracle GraalVM Enterprise Edition 21.3.18; Oracle Graalvm For Jdk 17.0.19, 21.0.11; Oracle Java SE 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1.

**Is there a fix for CVE-2026-47063?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-47063 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-47063?** Check whether you run Oracle GraalVM Enterprise Edition, Oracle Graalvm For Jdk or Oracle Java SE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This vulnerability is located in the Libraries component of Oracle Java SE and GraalVM. It is categorized as an integrity-impacting flaw that allows an unauthenticated, remote attacker to compromise the environment via multiple protocols. The attack vector is network-based with low complexity and no user interaction required. Exploitation can occur through APIs, such as web services that process external data, or via sandboxed Java Web Start applications and applets that run untrusted code. Successful exploitation results in unauthorized creation, deletion, or modification of data accessible to the Java runtime.

## Affected products

- 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, 21.0.11
- Oracle GraalVM Enterprise Edition 21.3.18

## Timeline

- 2026-07-21: disclosed: Initial disclosure by Oracle in the July 2026 CPU
- 2026-07-21: advisory: NVD publication date

## References

- [https://www.oracle.com/security-alerts/cpujul2026.html](https://www.oracle.com/security-alerts/cpujul2026.html)

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