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Fencer Vulns
medium 5.3

CVE-2026-87291 json

Vulnerability in Oracle Java SE (component: Networking).

published 2026-10-20 19 d ago modified 2026-10-27 12 d ago also EUVD-2026-106332

cvss
5.3
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 23%
public exploits
0
none known

Summary

Vulnerability in Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 21.0.12.1, 25.0.4.1 and 27. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in 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 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Patch / fix

  • 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-2026-87291

  • java-25-openj9 openSUSE Tumbleweed 25.0.5.0-1.1
  • java-21-openjdk openSUSE Tumbleweed 21.0.13.0-1.1
  • java-25-openjdk openSUSE Tumbleweed 25.0.5.0-1.1

opensuse advisories openSUSE-SU-2026:12436-1openSUSE-SU-2026:12328-1openSUSE-SU-2026:12329-1

  • 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-2026:90504ALSA-2026:88347

  • java-25-openjdk Rocky Linux 9 1:25.0.5.0.8-1.0.el9_8

rocky linux advisories RLSA-2026:88347

  • openjdk17 Alpine 3.24, Alpine 3.23 17.0.21.0.3_p1-r0
  • 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-2026-87291

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-2026-87291 updated cvss 5.3

openjdk: Enhance HTTP Server (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
    affected: no fix available
  • 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
  • Red Hat CodeReady Linux Builder EUS (v.9.6) 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-21-openjdk-src-fastdebug 21.0.13.0.9-1.1.el9, java-21-openjdk-src-slowdebug 21.0.13.0.9-1.1.el9, java-21-openjdk-demo-fastdebug 21.0.13.0.9-1.1.el9, java-21-openjdk-demo-slowdebug 21.0.13.0.9-1.1.el9, +8 more Red Hat Enterprise Linux AppStream (v. 8) java-21-openjdk 21.0.13.0.9-1.1.el8, java-21-openjdk-src 21.0.13.0.9-1.1.el8, java-21-openjdk-demo 21.0.13.0.9-1.1.el8, java-21-openjdk-jmods 21.0.13.0.9-1.1.el8, java-21-openjdk-javadoc 21.0.13.0.9-1.1.el8, java-21-openjdk-headless 21.0.13.0.9-1.1.el8, +2 more
    fixed: vendor fix RHSA-2026:88349
  • Red Hat Enterprise Linux AppStream (v. 9) java-25-openjdk 25.0.5.0.8-1.0.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-21-openjdk-src 21.0.13.0.9-1.2.el9, java-25-openjdk-demo 25.0.5.0.8-1.0.el9, java-21-openjdk-demo 21.0.13.0.9-1.2.el9, +11 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
show 9 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) java-21-openjdk 21.0.13.0.9-1.1.el9, java-21-openjdk-src 21.0.13.0.9-1.1.el9, java-21-openjdk-demo 21.0.13.0.9-1.1.el9, java-21-openjdk-jmods 21.0.13.0.9-1.1.el9, java-21-openjdk-javadoc 21.0.13.0.9-1.1.el9, java-21-openjdk-headless 21.0.13.0.9-1.1.el9, +2 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-21-openjdk 21.0.13.0.9-1.1.el9, java-21-openjdk-src 21.0.13.0.9-1.1.el9, java-21-openjdk-demo 21.0.13.0.9-1.1.el9, java-21-openjdk-jmods 21.0.13.0.9-1.1.el9, java-21-openjdk-javadoc 21.0.13.0.9-1.1.el9, java-21-openjdk-headless 21.0.13.0.9-1.1.el9, +2 more
    fixed: vendor fix RHSA-2026:88349
  • 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-21-openjdk-fastdebug 21.0.13.0.9-1.2.el9, java-21-openjdk-slowdebug 21.0.13.0.9-1.2.el9, java-25-openjdk-src-fastdebug 25.0.5.0.8-1.0.el9, java-25-openjdk-src-slowdebug 25.0.5.0.8-1.0.el9, +24 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-21-openjdk-fastdebug 21.0.13.0.9-1.1.el8, java-21-openjdk-slowdebug 21.0.13.0.9-1.1.el8, java-21-openjdk-src-fastdebug 21.0.13.0.9-1.1.el8, java-21-openjdk-src-slowdebug 21.0.13.0.9-1.1.el8, java-21-openjdk-demo-fastdebug 21.0.13.0.9-1.1.el8, java-21-openjdk-demo-slowdebug 21.0.13.0.9-1.1.el8, +8 more
    fixed: vendor fix RHSA-2026:88349
  • 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 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 build of OpenJDK 11 ELS java-11-openjdk, java-11-openjdk-windows, java-11-openjdk-portable Red Hat build of OpenJDK 17 java-17-openjdk-windows, java-17-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-17-openjdk, java-1.8.0-ibm-src, java-1.8.0-openjdk, java-1.8.0-ibm-demo, java-1.8.0-ibm-jdbc, +42 more Red Hat Enterprise Linux 9 java-17-openjdk, java-1.8.0-openjdk, java-17-openjdk-src, java-17-openjdk-demo, java-17-openjdk-jmods, java-1.8.0-openjdk-src, +32 more
    +1 more products
    Red Hat Hardened Images java-17-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
12 d ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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.