Quick answers
- Is CVE-2026-87294 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-87294 being exploited in the wild.
- How severe is CVE-2026-87294?
- Medium severity, with a CVSS score of 6.5, published 20 October 2026.
- Which products and versions are affected?
- Oracle GraalVM Enterprise Edition 21.3.19.1.1; Oracle Graalvm For Jdk 17.0.20.1, 21.0.12.1; Oracle Java SE 8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27.
- Is there a fix for CVE-2026-87294?
- 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-2026-87294 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-87294?
- 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
The vulnerability exists in the Security component of Oracle Java SE and GraalVM products, exploitable via multiple network protocols without authentication or user interaction. An attacker can leverage exposed APIs (e.g., through web services) to read and modify sensitive data with low attack complexity. The flaw affects Java deployments including Web Start applications and applets that rely on the Java sandbox.
Affected products
- Oracle Java SE 8u503, 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, 21.0.12.1
- Oracle GraalVM Enterprise Edition 21.3.19.1.1
Timeline
- 2026-10-20: disclosed