# CVE-2026-83408: Oracle GraalVM Compiler remote code execution

Source: https://junglewise.ai/threats/cve-2026-83408-oracle-graalvm-compiler-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-83408 · Severity: high · CVSS 8.1 · Published 2026-09-15

Oracle GraalVM is a high-performance Java virtual machine that optimizes and executes Java applications. A vulnerability in the compiler component allows an unauthenticated attacker with network access to achieve complete system compromise, including data theft, modification, and denial of service.

Technologies: [Oracle Graalvm](https://junglewise.ai/threats/technologies/graalvm). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-83408 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83408 being exploited in the wild.

**How severe is CVE-2026-83408?** High severity, with a CVSS score of 8.1, published 15 September 2026.

**Which products and versions are affected?** Oracle Graalvm 25.0.4.1; Oracle GraalVM for JDK 17 23.0.13.1; Oracle GraalVM for JDK 21 23.1.12.1.

**Is there a fix for CVE-2026-83408?** 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-2026-83408 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-83408?** Check whether you run Oracle Graalvm, Oracle GraalVM for JDK 17 or Oracle GraalVM for JDK 21 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

A difficult-to-exploit vulnerability exists in the Compiler component of Oracle GraalVM for JDK and Oracle GraalVM. The vulnerability is remotely exploitable over HTTP by an unauthenticated attacker without user interaction required. Successful exploitation results in complete compromise of the affected system, affecting confidentiality, integrity, and availability. The attack vector is network-based with high complexity, making it resistant to trivial exploitation attempts. Affected versions include GraalVM for JDK 17 (23.0.13.1), GraalVM for JDK 21 (23.1.12.1), and GraalVM (25.0.4.1).

## Affected products

- Oracle GraalVM for JDK 17 23.0.13.1
- Oracle GraalVM for JDK 21 23.1.12.1
- Oracle GraalVM 25.0.4.1

## Timeline

- 2026-09-15: disclosed

## References

- [https://www.oracle.com/security-alerts/cspusep2026.html](https://www.oracle.com/security-alerts/cspusep2026.html)

## Related threats

- [Oracle GraalVM Compiler vulnerability allowing unauthorized data access](https://junglewise.ai/threats/cve-2026-83368-oracle-graalvm-compiler-vulnerability-allowing-unauthorized-data)
- [Oracle GraalVM compiler remote code execution](https://junglewise.ai/threats/cve-2026-83357-oracle-graalvm-compiler-remote-code-execution)
- [Oracle GraalVM compiler remote code execution](https://junglewise.ai/threats/cve-2026-87288-oracle-graalvm-compiler-remote-code-execution)
- [Oracle GraalVM compiler remote code execution](https://junglewise.ai/threats/cve-2026-87287-oracle-graalvm-compiler-remote-code-execution)
- [Oracle GraalVM compiler vulnerability in Java SE](https://junglewise.ai/threats/cve-2026-87286-oracle-graalvm-compiler-vulnerability-in-java-se)