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Java CVE-2026-21945

HIGH
Uncontrolled Resource Consumption (CWE-400)
2026-01-20 secalert_us@oracle.com
Denial Of Service Java Oracle Graalvm Graalvm For Jdk Jdk Jre
7.5
CVSS 3.1 · Vendor: oracle
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Severity by source

Vendor (oracle) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Patch released
Apr 09, 2026 - 14:30 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 20, 2026 - 22:15 nvd
HIGH 7.5

DescriptionCVE.org

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 and 21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. 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 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. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). 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).

AnalysisAI

Remote denial of service in Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition allows unauthenticated attackers to trigger application hangs or crashes via network-accessible protocols. Multiple Java versions including JDK 8u471, 11.0.29, 17.0.17, 21.0.9, and 25.0.1 are affected through a flaw in the Security component. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send crafted network request via multiple protocols
Exploit
Trigger unbounded resource consumption
Execution
Exhaust system memory or CPU
Impact
Cause denial of service
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Vulnerability AssessmentAI

Exploitation No special conditions — remote unauthenticated exploitation against default configurations of Oracle Java SE (versions 8u471, 11.0.29, 17.0.17, 21.0.9, 25.0.1), Oracle GraalVM for JDK (17.0.17, 21.0.9), or Oracle GraalVM Enterprise Edition (21.3.16) via the Security component. Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.5 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote attacker without authentication could exploit this vulnerability to unauthorized ability to cause a hang or frequently repeatable crash (complete DO.
Remediation Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 7 days: Identify all affected systems and apply vendor patches promptly. …

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Vendor StatusVendor

SUSE

Severity: High
Product Status
Container suse/manager/5.0/x86_64/server-attestation:latest Affected
Container suse/manager/5.0/x86_64/server:latest Container suse/multi-linux-manager/5.1/x86_64/server:5.1.2.8.13.2 Image server-image Affected
Container suse/multi-linux-manager/5.1/x86_64/server-attestation:5.1.2.8.15.2 Image server-attestation-image Affected
Image SLES15-SP5-SAP-Azure-LI-BYOS Image SLES15-SP5-SAP-Azure-LI-BYOS-Production Image SLES15-SP5-SAP-Azure-VLI-BYOS Image SLES15-SP5-SAP-Azure-VLI-BYOS-Production Image SLES15-SP7-SAP-Azure-LI-BYOS-Production Image SLES15-SP7-SAP-Azure-VLI-BYOS-Production Affected
SUSE Liberty Linux 7 LTSS Fixed

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CVE-2026-21945 vulnerability details – vuln.today
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