CVE-2026-114820: Oracle Java SE JSSE protocol handling vulnerability

CVE-2026-114820 · Severity: critical · CVSS 9.1 · Published 2026-10-24

A critical vulnerability in Oracle Java's secure communications layer (JSSE) allows remote attackers without credentials to read, modify, or delete sensitive data on systems running vulnerable Java versions. The flaw can be exploited through network protocols and affects Java applications, applets, and web services, putting data confidentiality and integrity at significant risk.

Technologies: Oracle GraalVM Enterprise Edition, Oracle Graalvm For Jdk, Oracle Java SE. Vendors: Oracle.

Quick answers

Is CVE-2026-114820 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-114820 being exploited in the wild.
How severe is CVE-2026-114820?
Critical severity, with a CVSS score of 9.1, published 24 October 2026.
Which products and versions are affected?
Oracle GraalVM Enterprise Edition 21.3.20.0.2; Oracle Graalvm For Jdk 17.0.21.0.2, 21.0.13.0.2; Oracle Java SE 8u511-b32, 8u511-perf-b32, 11.0.33.0.2, 17.0.21.0.2, 21.0.13.0.2, 25.0.5.0.2, 27.0.1.0.2.
Is there a fix for CVE-2026-114820?
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-2026-114820 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-114820?
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

An easily exploitable vulnerability in the JSSE component of Oracle Java SE allows unauthenticated network-based attacks with no user interaction required. The vulnerability enables attackers to gain unauthorized access to critical data and modify or delete information across affected Java deployments, including web services and sandboxed applets. A patch is expected from Oracle addressing this issue in multiple Java versions.

Affected products

  • Oracle Java SE 8u511-b32, 8u511-perf-b32, 11.0.33.0.2, 17.0.21.0.2, 21.0.13.0.2, 25.0.5.0.2, 27.0.1.0.2
  • Oracle GraalVM for JDK 17.0.21.0.2, 21.0.13.0.2
  • Oracle GraalVM Enterprise Edition 21.3.20.0.2

Timeline

  • 2026-10-24: advisory

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