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).
Published: 2026-04-21
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Immediate Patch
AI Analysis

Impact

This vulnerability arises in the networking component of Oracle Java SE and GraalVM products. An unauthenticated attacker with network access can trigger a resource exhaustion that causes the runtime to hang or crash, resulting in a permanent or frequently repeatable denial of service for applications built on these environments.

Affected Systems

Affected products include Oracle GraalVM Enterprise Edition 21.3.17, Oracle GraalVM for JDK 17.0.18 and 21.0.10, and Oracle Java SE versions 8u481‑perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, and 26.

Risk and Exploitability

The CVSS v3.1 Base Score of 7.5 emphasizes high Availability impact. Attackers need only unauthenticated network access; privileged access or user interaction is not required. Although an EPSS score is not available, the lack of a KEV listing does not mitigate the risk, as the flaw remains exploitable across multiple network protocols.

Generated by OpenCVE AI on April 22, 2026 at 06:37 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Oracle security patch that addresses the networking vulnerability in Java SE and GraalVM.
  • Upgrade to a patched or newer runtime version that includes the fix.
  • Restrict network exposure of services that use the vulnerable APIs, or disable the affected networking components if feasible.
  • Audit client deployments to prevent untrusted code loading and further limit the attack surface.

Generated by OpenCVE AI on April 22, 2026 at 06:37 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 23 Apr 2026 00:15:00 +0000

Type Values Removed Values Added
Title Denial of Service via Networking Component in Oracle Java SE and GraalVM openjdk: OpenJDK: Enhance TLS connection handling (Oracle CPU 2026-04)
First Time appeared Redhat
Redhat enterprise Linux
Redhat openjdk Els
Weaknesses CWE-835
CPEs cpe:/a:redhat:enterprise_linux:9
cpe:/a:redhat:openjdk_els:11
cpe:/a:redhat:openjdk_els:11::el7
cpe:/a:redhat:openjdk_els:11::el8
cpe:/a:redhat:openjdk_els:11::el9
cpe:/o:redhat:enterprise_linux:10.1
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openjdk Els
References
Metrics threat_severity

None

 threat_severity

Important

Wed, 22 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 22 Apr 2026 07:00:00 +0000

Type Values Removed Values Added
Title Denial of Service via Networking Component in Oracle Java SE and GraalVM
Weaknesses CWE-400

Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
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).
First Time appeared Oracle
Oracle graalvm
Oracle graalvm For Jdk
Oracle java Se
CPEs cpe:2.3:a:oracle:graalvm:21.3.17:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:17.0.18:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:21.0.10:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:11.0.30:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:17.0.18:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:21.0.10:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:25.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:26:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:8u481:*:*:*:enterprise_performance:*:*:*
Vendors & Products Oracle
Oracle graalvm
Oracle graalvm For Jdk
Oracle java Se
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Oracle Graalvm Graalvm For Jdk Java Se
Redhat Enterprise Linux Openjdk Els
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-04-22T15:34:09.905Z

Reserved: 2026-03-26T19:48:45.676Z

Link: CVE-2026-34282

cve-icon Vulnrichment

Updated: 2026-04-22T15:34:05.323Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-21T21:16:32.643

Modified: 2026-04-22T21:24:26.997

Link: CVE-2026-34282

cve-icon Redhat

Severity : Important

Publid Date: 2026-04-21T20:00:00Z

Links: CVE-2026-34282 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-22T06:45:10Z

Weaknesses