CVE-2026-34282

Description

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: 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. 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 ability to cause a hang or frequently repeatable crash (complete 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 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

How to fix CVE-2026-34282

To remediate CVE-2026-34282, upgrade the affected package to a fixed version below.

• —upgrade to 1.8.0 or later
• —upgrade to 1.8.0 or later
• —upgrade to 1.8.0 or later
• —upgrade to 11.0.31+11-1~deb11u1 or later
• —upgrade to 17.0.19+10-1~deb11u1 or later
• —upgrade to 21.0.11+10-1~deb13u2 or later
• —upgrade to 25.0.3+9-2~deb13u1 or later

Is CVE-2026-34282 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (7)

• from 0, < 1.8.0, >= 1.9.0, < 8.0.491, >= 9.0.0, < 11.0.31, >= 12.0.0, < 17.0.19, >= 18.0.0, < 21.0.11, >= 22.0.0, < 25.0.3, >= 26.0.0, < 26.0.1
• from 0, < 1.8.0, >= 1.9.0, < 8.0.491, >= 9.0.0, < 11.0.31, >= 12.0.0, < 17.0.19, >= 18.0.0, < 21.0.11, >= 22.0.0, < 25.0.3, >= 26.0.0, < 26.0.1
• from 0, < 1.8.0, >= 1.9.0, < 8.0.491, >= 9.0.0, < 11.0.31, >= 12.0.0, < 17.0.19, >= 18.0.0, < 21.0.11, >= 22.0.0, < 25.0.3, >= 26.0.0, < 26.0.1
• from 0, < 11.0.31+11-1~deb11u1
• from 0, < 17.0.19+10-1~deb11u1
• from 0, < 21.0.11+10-1~deb13u2
• from 0, < 25.0.3+9-2~deb13u1

CVSS scores

References (3)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-34282
• WEBnvd.nist.gov/vuln/detail/CVE-2026-34282
• WEBwww.oracle.com/security-alerts/cpuapr2026.html