Skip to content
Fencer Vulns
medium 4.8

CVE-2026-91487 json

Vulnerability in Oracle Java SE (component: Compiler).

published 2026-10-20 19 d ago modified 2026-10-24 16 d ago also EUVD-2026-106732

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

Vulnerability in Oracle Java SE (component: Compiler). Supported versions that are affected are Oracle Java SE: 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 vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data as well as unauthorized read access to a subset of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).

Patch / fix

  • openjdk-17 Debian 12 17.0.21+9-1~deb12u1
  • openjdk-21 Debian 13 21.0.13+9-1~deb13u2
  • openjdk-21 Debian 14 21.0.13+9-1
  • openjdk-25 Debian 13 25.0.5+8-1~deb13u1
  • openjdk-25 Debian 14 25.0.5+8-1

debian advisories DEBIAN-CVE-2026-91487

  • java-21-openj9 openSUSE Tumbleweed 21.0.13.0-1.1
  • java-11-openjdk openSUSE Tumbleweed 11.0.33.0-1.1
  • java-21-openjdk openSUSE Tumbleweed 21.0.13.0-1.1
  • java-25-openjdk openSUSE Tumbleweed 25.0.5.0-1.1
  • java-17-openjdk openSUSE Tumbleweed 17.0.21.0-1.1

opensuse advisories openSUSE-SU-2026:12435-1openSUSE-SU-2026:12418-1openSUSE-SU-2026:12328-1openSUSE-SU-2026:12329-1openSUSE-SU-2026:12294-1

  • java-21-openjdk AlmaLinux 8 1:21.0.13.0.9-1.1.el8
  • java-21-openjdk AlmaLinux 9 1:21.0.13.0.9-1.2.el9.alma.1
  • java-21-openjdk-src AlmaLinux 9 1:21.0.13.0.9-1.2.el9.alma.1
  • java-21-openjdk-demo AlmaLinux 9 1:21.0.13.0.9-1.2.el9.alma.1
  • java-21-openjdk-jmods AlmaLinux 9 1:21.0.13.0.9-1.2.el9.alma.1
  • java-21-openjdk-javadoc AlmaLinux 9 1:21.0.13.0.9-1.2.el9.alma.1
  • java-21-openjdk-headless AlmaLinux 9 1:21.0.13.0.9-1.2.el9.alma.1
  • java-21-openjdk-fastdebug AlmaLinux 9 1:21.0.13.0.9-1.2.el9.alma.1

almalinux advisories ALSA-2026:88349ALSA-2026:90500ALSA-2026:90504ALSA-2026:88347ALSA-2026:88352

  • java-25-openjdk Rocky Linux 9 1:25.0.5.0.8-1.0.el9_8
  • java-17-openjdk Rocky Linux 8 1:17.0.21.0.9-2.1.el8_10

rocky linux advisories RLSA-2026:88347RLSA-2026:88352

  • openjdk21 Alpine 3.24, Alpine 3.23 21.0.13.0.3_p1-r0
  • openjdk25 Alpine 3.24, Alpine 3.23 25.0.5.0.3_p1-r0

alpine advisories ALPINE-CVE-2026-91487

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-91487 updated cvss 4.8

openjdk: Enhance C2 comparisons (Oracle CPU 2026-10)

  • 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 Red Hat Enterprise Linux 7 java-1.6.0-openjdk, java-1.7.0-openjdk, java-1.6.0-openjdk-src, java-1.7.0-openjdk-src, java-1.6.0-openjdk-demo, java-1.7.0-openjdk-demo, +4 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 10 java-21-ibm-semeru-certified-jdk Red Hat Hardened Images java-17-openjdk-portable 17.0.20.0.8-0.1.hum1
    affected: no fix available
  • Red Hat OPENJDK ELS 11.0.33
    fixed: vendor fix RHSA-2026:95273
  • Red Hat Build of OpenJDK 17.0.20.1
    fixed: vendor fix RHSA-2026:89916
  • Red Hat Build of OpenJDK 17.0.21
    fixed: vendor fix RHSA-2026:88353
  • Red Hat Build of OpenJDK 21.0.12.1
    fixed: vendor fix RHSA-2026:88350
  • Red Hat Build of OpenJDK 21.0.13
    fixed: vendor fix RHSA-2026:88351
  • Red Hat Build of OpenJDK 25.0.5
    fixed: vendor fix RHSA-2026:88348
show 17 more
  • Red Hat CodeReady Linux Builder EUS (v.9.6) java-17-openjdk-fastdebug 17.0.21.0.9-2.1.el9, java-17-openjdk-slowdebug 17.0.21.0.9-2.1.el9, java-21-openjdk-fastdebug 21.0.13.0.9-1.1.el9, java-21-openjdk-slowdebug 21.0.13.0.9-1.1.el9, java-17-openjdk-src-fastdebug 17.0.21.0.9-2.1.el9, java-17-openjdk-src-slowdebug 17.0.21.0.9-2.1.el9, +22 more
    fixed: vendor fix RHSA-2026:88349
  • Red Hat Enterprise Linux AppStream (v. 8) java-17-openjdk 17.0.21.0.9-2.1.el8, java-21-openjdk 21.0.13.0.9-1.1.el8, java-17-openjdk-src 17.0.21.0.9-2.1.el8, java-21-openjdk-src 21.0.13.0.9-1.1.el8, java-17-openjdk-demo 17.0.21.0.9-2.1.el8, java-21-openjdk-demo 21.0.13.0.9-1.1.el8, +10 more
    fixed: vendor fix RHSA-2026:88352
  • Red Hat Enterprise Linux AppStream (v. 9) java-25-openjdk 25.0.5.0.8-1.0.el9, java-17-openjdk 17.0.21.0.9-2.2.el9, java-21-openjdk 21.0.13.0.9-1.2.el9, java-25-openjdk-src 25.0.5.0.8-1.0.el9, java-17-openjdk-src 17.0.21.0.9-2.2.el9, java-21-openjdk-src 21.0.13.0.9-1.2.el9, +19 more
    fixed: vendor fix RHSA-2026:88347
  • Red Hat Enterprise Linux AppStream (v. 10) java-25-openjdk 25.0.5.0.8-1.0.el10, java-21-openjdk 21.0.13.0.9-1.2.el10, java-25-openjdk-src 25.0.5.0.8-1.0.el10, java-21-openjdk-src 21.0.13.0.9-1.2.el10, java-25-openjdk-demo 25.0.5.0.8-1.0.el10, java-21-openjdk-demo 21.0.13.0.9-1.2.el10, +11 more
    fixed: vendor fix RHSA-2026:90504
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) java-17-openjdk 17.0.21.0.9-2.1.el8, java-17-openjdk-src 17.0.21.0.9-2.1.el8, java-17-openjdk-demo 17.0.21.0.9-2.1.el8, java-17-openjdk-jmods 17.0.21.0.9-2.1.el8, java-17-openjdk-javadoc 17.0.21.0.9-2.1.el8, java-17-openjdk-headless 17.0.21.0.9-2.1.el8, +2 more Red Hat Enterprise Linux AppStream AUS (v.8.6) java-17-openjdk 17.0.21.0.9-2.1.el8, java-17-openjdk-src 17.0.21.0.9-2.1.el8, java-17-openjdk-demo 17.0.21.0.9-2.1.el8, java-17-openjdk-jmods 17.0.21.0.9-2.1.el8, java-17-openjdk-javadoc 17.0.21.0.9-2.1.el8, java-17-openjdk-headless 17.0.21.0.9-2.1.el8, +2 more Red Hat Enterprise Linux AppStream E4S (v.8.8) java-17-openjdk 17.0.21.0.9-2.1.el8, java-17-openjdk-src 17.0.21.0.9-2.1.el8, java-17-openjdk-demo 17.0.21.0.9-2.1.el8, java-17-openjdk-jmods 17.0.21.0.9-2.1.el8, java-17-openjdk-javadoc 17.0.21.0.9-2.1.el8, java-17-openjdk-headless 17.0.21.0.9-2.1.el8, +2 more
    fixed: vendor fix RHSA-2026:88352
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) java-17-openjdk 17.0.21.0.9-2.1.el9, java-17-openjdk-src 17.0.21.0.9-2.1.el9, java-17-openjdk-demo 17.0.21.0.9-2.1.el9, java-17-openjdk-jmods 17.0.21.0.9-2.1.el9, java-17-openjdk-javadoc 17.0.21.0.9-2.1.el9, java-17-openjdk-headless 17.0.21.0.9-2.1.el9, +2 more
    fixed: vendor fix RHSA-2026:90500
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) java-17-openjdk 17.0.21.0.9-2.1.el9, java-21-openjdk 21.0.13.0.9-1.1.el9, java-17-openjdk-src 17.0.21.0.9-2.1.el9, java-21-openjdk-src 21.0.13.0.9-1.1.el9, java-17-openjdk-demo 17.0.21.0.9-2.1.el9, java-21-openjdk-demo 21.0.13.0.9-1.1.el9, +10 more
    fixed: vendor fix RHSA-2026:88349
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) java-21-openjdk 21.0.13.0.9-1.1.el10, java-21-openjdk-src 21.0.13.0.9-1.1.el10, java-21-openjdk-demo 21.0.13.0.9-1.1.el10, java-21-openjdk-jmods 21.0.13.0.9-1.1.el10, java-21-openjdk-javadoc 21.0.13.0.9-1.1.el10, java-21-openjdk-headless 21.0.13.0.9-1.1.el10, +2 more
    fixed: vendor fix RHSA-2026:90504
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) java-17-openjdk 17.0.21.0.9-2.1.el9, java-21-openjdk 21.0.13.0.9-1.1.el9, java-17-openjdk-src 17.0.21.0.9-2.1.el9, java-21-openjdk-src 21.0.13.0.9-1.1.el9, java-17-openjdk-demo 17.0.21.0.9-2.1.el9, java-21-openjdk-demo 21.0.13.0.9-1.1.el9, +10 more
    fixed: vendor fix RHSA-2026:88349
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) java-17-openjdk 17.0.21.0.9-2.1.el8, java-17-openjdk-src 17.0.21.0.9-2.1.el8, java-17-openjdk-demo 17.0.21.0.9-2.1.el8, java-17-openjdk-jmods 17.0.21.0.9-2.1.el8, java-17-openjdk-javadoc 17.0.21.0.9-2.1.el8, java-17-openjdk-headless 17.0.21.0.9-2.1.el8, +16 more Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) java-17-openjdk 17.0.21.0.9-2.1.el8, java-17-openjdk-src 17.0.21.0.9-2.1.el8, java-17-openjdk-demo 17.0.21.0.9-2.1.el8, java-17-openjdk-jmods 17.0.21.0.9-2.1.el8, java-17-openjdk-javadoc 17.0.21.0.9-2.1.el8, java-17-openjdk-headless 17.0.21.0.9-2.1.el8, +2 more Red Hat Enterprise Linux AppStream TUS (v.8.8) java-17-openjdk 17.0.21.0.9-2.1.el8, java-17-openjdk-src 17.0.21.0.9-2.1.el8, java-17-openjdk-demo 17.0.21.0.9-2.1.el8, java-17-openjdk-jmods 17.0.21.0.9-2.1.el8, java-17-openjdk-javadoc 17.0.21.0.9-2.1.el8, java-17-openjdk-headless 17.0.21.0.9-2.1.el8, +2 more
    fixed: vendor fix RHSA-2026:88352
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) java-25-openjdk-fastdebug 25.0.5.0.8-1.0.el9, java-25-openjdk-slowdebug 25.0.5.0.8-1.0.el9, java-17-openjdk-fastdebug 17.0.21.0.9-2.2.el9, java-17-openjdk-slowdebug 17.0.21.0.9-2.2.el9, java-21-openjdk-fastdebug 21.0.13.0.9-1.2.el9, java-21-openjdk-slowdebug 21.0.13.0.9-1.2.el9, +38 more
    fixed: vendor fix RHSA-2026:88347
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) java-25-openjdk-fastdebug 25.0.5.0.8-1.0.el10, java-25-openjdk-slowdebug 25.0.5.0.8-1.0.el10, java-21-openjdk-fastdebug 21.0.13.0.9-1.2.el10, java-21-openjdk-slowdebug 21.0.13.0.9-1.2.el10, java-25-openjdk-src-fastdebug 25.0.5.0.8-1.0.el10, java-25-openjdk-src-slowdebug 25.0.5.0.8-1.0.el10, +24 more Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) java-21-openjdk-fastdebug 21.0.13.0.9-1.1.el10, java-21-openjdk-slowdebug 21.0.13.0.9-1.1.el10, java-21-openjdk-src-fastdebug 21.0.13.0.9-1.1.el10, java-21-openjdk-src-slowdebug 21.0.13.0.9-1.1.el10, java-21-openjdk-demo-fastdebug 21.0.13.0.9-1.1.el10, java-21-openjdk-demo-slowdebug 21.0.13.0.9-1.1.el10, +8 more
    fixed: vendor fix RHSA-2026:90504
  • Red Hat Enterprise Linux CRB (v. 8) java-17-openjdk-fastdebug 17.0.21.0.9-2.1.el8, java-17-openjdk-slowdebug 17.0.21.0.9-2.1.el8, java-21-openjdk-fastdebug 21.0.13.0.9-1.1.el8, java-21-openjdk-slowdebug 21.0.13.0.9-1.1.el8, java-17-openjdk-src-fastdebug 17.0.21.0.9-2.1.el8, java-17-openjdk-src-slowdebug 17.0.21.0.9-2.1.el8, +22 more
    fixed: vendor fix RHSA-2026:88352
  • Red Hat Hardened Images java-25-openjdk 25.0.5.0.8-3.1.hum1, java-21-openjdk 21.0.13.0.9-0.1.hum1, java-25-openjdk-src 25.0.5.0.8-3.1.hum1, java-21-openjdk-src 21.0.13.0.9-0.1.hum1, java-25-openjdk-demo 25.0.5.0.8-3.1.hum1, java-21-openjdk-demo 21.0.13.0.9-0.1.hum1, +61 more
    fixed: vendor fix RHSA-2026:94403
  • 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 Temurin Build of OpenJDK 25.0.4.1
    fixed: vendor fix RHSA-2026:90912
  • Red Hat build of OpenJDK 1.8 java-1.8.0-openjdk-windows, java-1.8.0-openjdk-portable Red Hat Enterprise Linux 7 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-javadoc-zip, +1 more 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
    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
no
Technical impact
partial
Assessed
16 d ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

  • Oracle Corporation Oracle Java SE

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.