Quick answers
- Is CVE-2026-91385 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91385 being exploited in the wild.
- How severe is CVE-2026-91385?
- Medium severity, with a CVSS score of 5.4, published 20 October 2026.
- Which products and versions are affected?
- Oracle GraalVM Enterprise Edition 21.3.19.1.1; Oracle Java SE 8u503; Oracle JavaFX 21.0.12, 25.0.4, 27.
- Is there a fix for CVE-2026-91385?
- 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-2026-91385 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-91385?
- Check whether you run Oracle GraalVM Enterprise Edition, Oracle Java SE or Oracle JavaFX 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
An easily exploitable vulnerability in the JavaFX component of Oracle Java SE, JavaFX, and GraalVM Enterprise Edition allows unauthenticated attackers with network access to compromise data integrity and confidentiality via multiple protocols. The vulnerability requires user interaction (running untrusted Java code) but grants unauthorized read, update, insert, or delete access to application data. The flaw is sandbox-escape capable when users load and execute untrusted Java Web Start applications or applets from the internet.
Affected products
- Oracle Java SE 8u503
- Oracle JavaFX 21.0.12, 25.0.4, 27
- Oracle GraalVM Enterprise Edition 21.3.19.1.1
Timeline
- 2026-10-20: disclosed