UBUNTU-CVE-2026-91487: Medium severity ubuntu/openjdk-8 vulnerability
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).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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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
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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
Upgrade
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
What kind of deployment is realistically exposed?
Exposure requires an application to accept attacker-supplied data through APIs in the Compiler component. The advisory gives a web service as an example of a path that could supply that data.
Does an attacker need credentials or user interaction?
No. The vulnerability is described as exploitable by an unauthenticated attacker with network access via multiple protocols, and it does not require user interaction; however, exploitation is rated difficult.
Are untrusted Java Web Start applications or applets required?
No. The issue can be exploited by supplying data to the affected component APIs without using untrusted Java Web Start applications or untrusted Java applets.
What could a successful attack allow?
A successful attack may permit unauthorized reading of a subset of accessible data and unauthorized updating, inserting, or deleting of some accessible data. The stated impacts are limited to confidentiality and integrity, with no availability impact.