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Critical · 9.1 Public exploit CVE-2026-91403 EUVD-2026-107578GHSA-9h75-rf66-wh3r

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

Published Oct 21, 2026 · Updated Oct 24, 2026 · Assigned by oracle

Vendor: Oracle Product: Oracle GraalVM Enterprise Edition Product: Oracle GraalVM for JDK Product: Oracle Java SE Package: ca-certificates Package: ca-certificates-bundle Package: ca-certificates-bundle-ecs Package: ca-certificates-doc Package: ca-certificates-mozilla Package: java-cacerts Package: kaniko-ca-certificates-bundle Package: openjdk-13 Package: openjdk-16 Package: openjdk-17 Package: openjdk-18 Package: openjdk-21 Package: openjdk-25 Package: openjdk-27 Package: openjdk-8 Package: openjdk-9 Package: openjdk-lts Package: openjdk17 Package: openjdk21 Package: openjdk25 Package: python-tensorboard Ecosystem: Alpine Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu Ecosystem: Wolfi

Description

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 8u511, 8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5, 27.0.1; Oracle GraalVM for JDK: 17.0.21 and 21.0.13; Oracle GraalVM Enterprise Edition: 21.3.20. 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 creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. 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 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

Affected products

VendorProductAffectedFixed
Oracle Oracle Java SE 8u511, 8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5, 27.0.1 —
Oracle Oracle GraalVM for JDK 17.0.21, 21.0.13 —
Oracle Oracle GraalVM Enterprise Edition 21.3.20 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 openjdk-21 21.0.13+9-1 —
Debian 14 openjdk-25 25.0.5+8-1 —
Debian 14 openjdk-27 No fix yet —
Debian 13 openjdk-21 21.0.13+9-1~deb13u2 —
Debian 13 openjdk-25 25.0.5+8-1~deb13u1 —
Debian 12 openjdk-17 No fix yet —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 26.10 openjdk-17 17.0.21.0.3+1-1~26.10.1 USN-9014-1
Ubuntu 26.10 openjdk-21 21.0.13.0.3+1-1~26.10.1 USN-9015-1
Ubuntu 26.10 openjdk-25 25.0.5.0.3+1-1~26.10.1 USN-9004-1
Ubuntu 26.10 openjdk-27 27.0.1.0.3+1-1~26.10.1 USN-9005-1
Ubuntu 26.10 openjdk-8 8u512-b09~us1-0ubuntu1~26.10.1 USN-9009-1
Ubuntu 26.10 openjdk-lts 11.0.33+9-1ubuntu1~26.10.1 USN-9010-1
Ubuntu 26.04 LTS openjdk-17 17.0.21.0.3+1-1~26.04.1 USN-9014-1
Ubuntu 26.04 LTS openjdk-21 21.0.13.0.3+1-1~26.04.1 USN-9015-1
Ubuntu 26.04 LTS openjdk-25 25.0.5.0.3+1-1~26.04.1 USN-9004-1
Ubuntu 26.04 LTS openjdk-8 8u512-b09~us1-0ubuntu1~26.04.1 USN-9009-1
Ubuntu 26.04 LTS openjdk-lts 11.0.33+9-1ubuntu1~26.04.1 USN-9010-1
Ubuntu 24.04 LTS openjdk-17 17.0.21.0.3+1-1~24.04.1 USN-9014-1
Ubuntu 24.04 LTS openjdk-21 21.0.13.0.3+1-1~24.04.1 USN-9015-1
Ubuntu 24.04 LTS openjdk-25 25.0.5.0.3+1-1~24.04.1 USN-9004-1
Ubuntu 24.04 LTS openjdk-8 8u512-b09~us1-0ubuntu1~24.04.1 USN-9009-1
Ubuntu 24.04 LTS openjdk-lts 11.0.33+9-1ubuntu1~24.04.1 USN-9010-1
Ubuntu 22.04 LTS openjdk-17 17.0.21.0.3+1-1~22.04.1 USN-9014-1
Ubuntu 22.04 LTS openjdk-18 No fix yet —
Ubuntu 22.04 LTS openjdk-21 21.0.13.0.3+1-1~22.04.1 USN-9015-1
Ubuntu 22.04 LTS openjdk-25 25.0.5.0.3+1-1~22.04.1 USN-9004-1
Ubuntu 22.04 LTS openjdk-8 8u512-b09~us1-0ubuntu1~22.04.1 USN-9009-1
Ubuntu 22.04 LTS openjdk-lts 11.0.33+9-1ubuntu1~22.04.1 USN-9010-1
Ubuntu 20.04 LTS openjdk-13 +1 No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS openjdk-9 No fix yet —
Ubuntu Pro 20.04 LTS openjdk-17 17.0.21.0.3+1-1~20.04.1 USN-9014-1
Ubuntu Pro 20.04 LTS openjdk-21 21.0.13.0.3+1-1~20.04.1 USN-9015-1
Ubuntu Pro 20.04 LTS openjdk-8 8u512-b09~us1-0ubuntu1~20.04.1 USN-9009-1
Ubuntu Pro 20.04 LTS openjdk-lts 11.0.33+9-1ubuntu1~20.04.1 USN-9010-1
Ubuntu Pro 18.04 LTS openjdk-17 17.0.21.0.3+1-1~18.04.1 USN-9014-1
Ubuntu Pro 18.04 LTS openjdk-8 8u512-b09~us1-0ubuntu1~18.04.1 USN-9009-1
Ubuntu Pro 18.04 LTS openjdk-lts 11.0.33+9-1ubuntu1~18.04.1 USN-9010-1
Ubuntu Pro 16.04 LTS openjdk-8 8u512-b09~us1-0ubuntu1~16.04.1 USN-9009-1

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 java-21-openjdk +22 1:21.0.13.0.9-1.2.el10.alma.1 ALSA-2026:90504
AlmaLinux 10 java-25-openjdk +25 1:25.0.5.0.8-1.0.el10.alma.1 ALSA-2026:88347
AlmaLinux 9 java-17-openjdk +22 1:17.0.21.0.9-2.2.el9.alma.1 ALSA-2026:90500
AlmaLinux 9 java-21-openjdk +22 1:21.0.13.0.9-1.2.el9.alma.1 ALSA-2026:88349
AlmaLinux 9 java-25-openjdk +25 1:25.0.5.0.8-1.0.el9.alma.1 ALSA-2026:88347
AlmaLinux 8 java-17-openjdk +22 1:17.0.21.0.9-2.1.el8 ALSA-2026:88352
AlmaLinux 8 java-21-openjdk 1:21.0.13.0.9-1.1.el8 ALSA-2026:88349

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed java-11-openjdk 11.0.33.0-1.1 openSUSE-SU-2026:12418-1
openSUSE Tumbleweed java-17-openjdk 17.0.21.0-1.1 openSUSE-SU-2026:12294-1
openSUSE Tumbleweed java-1_8_0-openjdk 1.8.0.512-1.1 openSUSE-SU-2026:12513-1
openSUSE Tumbleweed java-21-openj9 +1 21.0.13.0-1.1 openSUSE-SU-2026:12435-1, openSUSE-SU-2026:12328-1
openSUSE Tumbleweed java-25-openjdk 25.0.5.0-1.1 openSUSE-SU-2026:12329-1

Alpine

Security tracker ↗
ReleasePackageFixed inAdvisory
Alpine v3.24 openjdk17 17.0.21.0.3_p1-r0 —
Alpine v3.24 openjdk21 21.0.13.0.3_p1-r0 —
Alpine v3.24 openjdk25 25.0.5.0.3_p1-r0 —
Alpine v3.23 openjdk17 17.0.21.0.3_p1-r0 —
Alpine v3.23 openjdk21 21.0.13.0.3_p1-r0 —
Alpine v3.23 openjdk25 25.0.5.0.3_p1-r0 —

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 java-1.8.0-amazon-corretto +2 1:1.8.0_512.b08-1.amzn2023 ALAS2023-2026-3315
Amazon Linux 2023 java-11-amazon-corretto +5 1:11.0.33.0.9-1.amzn2023 ALAS2023-2026-3317
Amazon Linux 2023 java-17-amazon-corretto +5 1:17.0.21.0.10-1.amzn2023.1 ALAS2023-2026-3318
Amazon Linux 2023 java-21-amazon-corretto +5 1:21.0.13.0.10-1.amzn2023.1 ALAS2023-2026-3319
Amazon Linux 2023 java-25-amazon-corretto +5 1:25.0.5.0.9-1.amzn2023.1 ALAS2023-2026-3320
Amazon Linux 2023 java-27-amazon-corretto +5 1:27.0.1.0.10-1.amzn2023.1 ALAS2023-2026-3316
Amazon Linux 2 java-11-amazon-corretto +3 1:11.0.33.0.9-1.amzn2 ALAS2-2026-4039
Amazon Linux 2 java-17-amazon-corretto +5 1:17.0.21.0.10-1.amzn2.1 ALAS2-2026-4040

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 python-tensorboard No fix yet —

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling java-cacerts +6 20260909-r3 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 5 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 26

References