Vulnerability · Published Oct 20, 2026 · Assigned by oracle
CVE-2026-87291
Medium 5.3
In plain English
A medium-severity improper authentication in Oracle Java SE from Oracle Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 76.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | java-21-openjdk | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:8 | java-21-openjdk | 1:21.0.13.0.9-1.1.el8 | ALSA-2026:88349 |
| AlmaLinux:9 | java-21-openjdk | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-demo | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-demo | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-demo-fastdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-demo-fastdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-demo-slowdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-demo-slowdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-devel | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-devel | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-devel-fastdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-devel-fastdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-devel-slowdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-devel-slowdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-fastdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-fastdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-headless | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-headless | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-headless-fastdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-headless-fastdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-headless-slowdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-headless-slowdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-javadoc | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-javadoc | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-javadoc-zip | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-javadoc-zip | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-jmods | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-jmods | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-jmods-fastdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-jmods-fastdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-jmods-slowdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-jmods-slowdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-slowdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-slowdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-src | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-src | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-src-fastdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-src-fastdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-src-slowdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-src-slowdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-static-libs | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-static-libs | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-static-libs-fastdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-static-libs-fastdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-21-openjdk-static-libs-slowdebug | 1:21.0.13.0.9-1.2.el10.alma.1 | ALSA-2026:90504 |
| AlmaLinux:9 | java-21-openjdk-static-libs-slowdebug | 1:21.0.13.0.9-1.2.el9.alma.1 | ALSA-2026:88349 |
| AlmaLinux:10 | java-25-openjdk | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-crypto-adapter | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-crypto-adapter | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-crypto-adapter-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-crypto-adapter-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-crypto-adapter-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-crypto-adapter-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-demo | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-demo | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-demo-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-demo-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-demo-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-demo-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-devel | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-devel | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-devel-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-devel-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-devel-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-devel-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-headless | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-headless | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-headless-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-headless-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-headless-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-headless-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-javadoc | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-javadoc | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-javadoc-zip | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-javadoc-zip | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-jmods | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-jmods | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-jmods-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-jmods-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-jmods-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-jmods-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-src | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-src | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-src-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-src-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-src-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-src-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-static-libs | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-static-libs | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-static-libs-fastdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-static-libs-fastdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| AlmaLinux:10 | java-25-openjdk-static-libs-slowdebug | 1:25.0.5.0.8-1.0.el10.alma.1 | ALSA-2026:88347 |
| AlmaLinux:9 | java-25-openjdk-static-libs-slowdebug | 1:25.0.5.0.8-1.0.el9.alma.1 | ALSA-2026:88347 |
| Alpine:v3.23 | openjdk17 | 17.0.21.0.3_p1-r0 | ALPINE-CVE-2026-87291 |
| Alpine:v3.24 | openjdk17 | 17.0.21.0.3_p1-r0 | ALPINE-CVE-2026-87291 |
| Alpine:v3.23 | openjdk21 | 21.0.13.0.3_p1-r0 | ALPINE-CVE-2026-87291 |
| Alpine:v3.24 | openjdk21 | 21.0.13.0.3_p1-r0 | ALPINE-CVE-2026-87291 |
| Alpine:v3.23 | openjdk25 | 25.0.5.0.3_p1-r0 | ALPINE-CVE-2026-87291 |
| Alpine:v3.24 | openjdk25 | 25.0.5.0.3_p1-r0 | ALPINE-CVE-2026-87291 |
| Debian:13 | openjdk-21 | 21.0.13+9-1~deb13u2 | DEBIAN-CVE-2026-87291 |
| Debian:14 | openjdk-21 | 21.0.13+9-1 | DEBIAN-CVE-2026-87291 |
| Debian:13 | openjdk-25 | 25.0.5+8-1~deb13u1 | DEBIAN-CVE-2026-87291 |
| Debian:14 | openjdk-25 | 25.0.5+8-1 | DEBIAN-CVE-2026-87291 |
| Debian:14 | openjdk-27 | no fix listed | DEBIAN-CVE-2026-87291 |
| Rocky Linux:9 | java-25-openjdk | 1:25.0.5.0.8-1.0.el9_8 | RLSA-2026:88347 |
| Ubuntu:22.04:LTS | openjdk-17 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:24.04:LTS | openjdk-17 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.04:LTS | openjdk-17 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-17 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.04:LTS | openjdk-17-crac | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-17-crac | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:22.04:LTS | openjdk-18 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:22.04:LTS | openjdk-21 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:24.04:LTS | openjdk-21 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.04:LTS | openjdk-21 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-21 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.04:LTS | openjdk-21-crac | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-21-crac | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:22.04:LTS | openjdk-25 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:24.04:LTS | openjdk-25 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.04:LTS | openjdk-25 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-25 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-27 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:22.04:LTS | openjdk-8 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:24.04:LTS | openjdk-8 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.04:LTS | openjdk-8 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-8 | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:22.04:LTS | openjdk-lts | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.04:LTS | openjdk-lts | no fix listed | UBUNTU-CVE-2026-87291 |
| Ubuntu:26.10 | openjdk-lts | no fix listed | UBUNTU-CVE-2026-87291 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Oracle Corporation | Oracle Java SE | 21.0.12.125.0.4.127 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- Oracle Advisory vendor-advisory