UBUNTU-CVE-2026-91394: Medium severity ubuntu/openjdk-8 vulnerability
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 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. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK 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 5.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/openjdk-ltsto a version that resolves this vulnerability.Fixed in 11.0.33+9-1ubuntu1~18.04.1 - Upgrade
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ubuntu/openjdk-ltsto a version that resolves this vulnerability.Fixed in 11.0.33+9-1ubuntu1~20.04.1 - Upgrade
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ubuntu/openjdk-25to a version that resolves this vulnerability.Fixed in 25.0.5.0.3+1-1~22.04.1 - Upgrade
Upgrade
ubuntu/openjdk-ltsto a version that resolves this vulnerability.Fixed in 11.0.33+9-1ubuntu1~22.04.1 - Upgrade
Upgrade
ubuntu/openjdk-25to a version that resolves this vulnerability.Fixed in 25.0.5.0.3+1-1~24.04.1 - Upgrade
Upgrade
ubuntu/openjdk-ltsto a version that resolves this vulnerability.Fixed in 11.0.33+9-1ubuntu1~24.04.1 - Upgrade
Upgrade
ubuntu/openjdk-25to a version that resolves this vulnerability.Fixed in 25.0.5.0.3+1-1~26.10.1 - Upgrade
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ubuntu/openjdk-27to a version that resolves this vulnerability.Fixed in 27.0.1.0.3+1-1~26.10.1 - Upgrade
Upgrade
ubuntu/openjdk-ltsto a version that resolves this vulnerability.Fixed in 11.0.33+9-1ubuntu1~26.10.1 - Upgrade
Upgrade
ubuntu/openjdk-25to a version that resolves this vulnerability.Fixed in 25.0.5.0.3+1-1~26.04.1 - Upgrade
Upgrade
ubuntu/openjdk-ltsto a version that resolves this vulnerability.Fixed in 11.0.33+9-1ubuntu1~26.04.1
Event History
Frequently Asked Questions
Which deployments are most exposed to this issue?
Network-reachable Java or GraalVM applications are exposed when they use the affected Networking component APIs, including web services that pass supplied data to those APIs. Client deployments running sandboxed Java Web Start applications or sandboxed Java applets that load untrusted internet-originated code are also affected.
Does exploitation require authentication or user interaction?
No. The vulnerability can be exploited by an unauthenticated attacker with network access, and the CVSS vector indicates that no user interaction is required; however, exploitation is considered difficult and may occur through multiple protocols.
What is the potential impact of a successful attack?
A successful attack can give an attacker unauthorized access to critical data or complete access to data accessible to the affected Oracle Java SE or Oracle GraalVM for JDK deployment. The stated impact is confidentiality only; integrity and availability impacts are not listed.
Which affected versions are identified?
The affected Oracle Java SE versions are 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, and 27. The affected Oracle GraalVM for JDK versions are 17.0.20.1 and 21.0.12.1.