Ubuntu fixes OpenJDK 27 flaws that can expose data
USN-9005-1 covers remote authentication failures in 2D and Networking, including CVE-2026-91415 and CVE-2026-83395.
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CVE-2026-83395
Improper access control in Oracle Java SE Networking
- CVSS 3.1
- 6.5 medium
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
An easily exploitable improper access control flaw in the Networking component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition lets an unauthenticated attacker with network access, via multiple protocols, change some accessible data and cause a partial denial of service. It can be triggered through APIs, including a web service that supplies data to them, and also in sandboxed Java Web Start or applet deployments that run untrusted code. Listed supported builds of those products are affected.
What to do: Apply Oracle's update for CVE-2026-83395. Oracle has not listed fixed versions.
| Product | Affected |
|---|---|
| Oracle Java SE | 8u503, 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, 21.0.12.1 |
| Oracle GraalVM Enterprise Edition | 21.3.19.1.1 |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u503, 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. 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 update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. 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 6.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).
- Weakness
- CWE-284
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L