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Servers and applications

CVE-2026-91398

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 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 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit…

Severity
Medium 6.8
Published
20 Oct 2026
Last changed
23 Oct 2026
Added to UpHeron
3 Nov 2026
Sources
CVE Program

Affected software

SoftwareAffected versions
JavaServers and applications · cna:oracle corporation|oracle graalvm for jdk
  • Every version up to 17.0.20.1
  • From 21 up to 21.0.12.1
JavaServers and applications · cna:oracle corporation|oracle java se
  • Every version up to 8u503
  • From 11 up to 11.0.32.1
  • From 17 up to 17.0.20.1
  • From 21 up to 21.0.12.1
  • From 25 up to 25.0.4.1
  • From 27 up to 27

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-91398