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Fencer Vulns
medium 6.5

CVE-2026-91396 json

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Utilit…

published 2026-10-20 19 d ago modified 2026-10-22 17 d ago also EUVD-2026-106650

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Utility). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 6.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).

Patch / fix

  • java-11-openjdk openSUSE Tumbleweed 11.0.33.0-1.1

opensuse advisories openSUSE-SU-2026:12418-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-91396 updated cvss 6.5

openjdk: Improve Pack200 handling (Oracle CPU 2026-10)

  • Red Hat build of OpenJDK 1.8 java-1.8.0-openjdk-windows, java-1.8.0-openjdk-portable
    affected: no fix available
  • Red Hat Enterprise Linux 6 java-1.6.0-openjdk, java-1.7.0-openjdk, java-1.8.0-openjdk, java-1.6.0-openjdk-src, java-1.7.0-openjdk-src, java-1.8.0-openjdk-src, +7 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 java-1.6.0-openjdk, java-1.7.0-openjdk, java-1.8.0-openjdk, java-1.6.0-openjdk-src, java-1.7.0-openjdk-src, java-1.8.0-openjdk-src, +11 more
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 java-1.8.0-ibm, java-1.8.0-ibm-src, java-1.8.0-openjdk, java-1.8.0-ibm-demo, java-1.8.0-ibm-jdbc, java-1.8.0-ibm-plugin, +20 more Red Hat Enterprise Linux 9 java-1.8.0-openjdk, java-1.8.0-openjdk-src, java-1.8.0-openjdk-demo, java-1.8.0-openjdk-javadoc, java-1.8.0-openjdk-headless, java-1.8.0-openjdk-fastdebug, +10 more
    affected: no fix available
  • Red Hat OPENJDK ELS 11.0.33
    fixed: vendor fix RHSA-2026:95273
  • Red Hat OpenJDK 11 ELS for RHEL 7 java-11-openjdk 11.0.33.0.10-1.el7_9, java-11-openjdk-src 11.0.33.0.10-1.el7_9, java-11-openjdk-demo 11.0.33.0.10-1.el7_9, java-11-openjdk-jmods 11.0.33.0.10-1.el7_9, java-11-openjdk-javadoc 11.0.33.0.10-1.el7_9, java-11-openjdk-headless 11.0.33.0.10-1.el7_9, +2 more Red Hat OpenJDK 11 ELS for RHEL 8 java-11-openjdk 11.0.33.0.10-1.el8, java-11-openjdk-src 11.0.33.0.10-1.el8, java-11-openjdk-demo 11.0.33.0.10-1.el8, java-11-openjdk-jmods 11.0.33.0.10-1.el8, java-11-openjdk-javadoc 11.0.33.0.10-1.el8, java-11-openjdk-headless 11.0.33.0.10-1.el8, +16 more Red Hat OpenJDK 11 ELS for RHEL 9 java-11-openjdk 11.0.33.0.10-1.el9, java-11-openjdk-src 11.0.33.0.10-1.el9, java-11-openjdk-demo 11.0.33.0.10-1.el9, java-11-openjdk-jmods 11.0.33.0.10-1.el9, java-11-openjdk-javadoc 11.0.33.0.10-1.el9, java-11-openjdk-headless 11.0.33.0.10-1.el9, +16 more
    fixed: vendor fix RHSA-2026:94520
  • Red Hat build of OpenJDK 17 java-17-openjdk-windows, java-17-openjdk-portable Red Hat build of OpenJDK 21 java-21-openjdk-windows, java-21-openjdk-portable Red Hat build of OpenJDK 25 java-25-openjdk-windows, java-25-openjdk-portable Red Hat Enterprise Linux 8 java-17-openjdk, java-21-openjdk, java-17-openjdk-src, java-21-openjdk-src, java-17-openjdk-demo, java-21-openjdk-demo, +38 more Red Hat Enterprise Linux 9 java-17-openjdk, java-21-openjdk, java-25-openjdk, java-17-openjdk-src, java-21-openjdk-src, java-25-openjdk-src, +63 more Red Hat Enterprise Linux 10 java-21-openjdk, java-25-openjdk, java-21-ibm-semeru-certified-jdk
    +1 more products
    Red Hat Hardened Images java-21-openjdk, java-25-openjdk, java-17-openjdk-portable, java-21-openjdk-portable, java-25-openjdk-portable
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
17 d ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected products

  • Oracle Corporation Oracle Java SE
  • Oracle Corporation Oracle GraalVM for JDK
  • Oracle Corporation Oracle GraalVM Enterprise Edition

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.