Is CVE-2026-21945 actively exploited?

CVE-2026-21945 has no public evidence of in-the-wild exploitation as of 2026-01-21.

What is the CVSS score for CVE-2026-21945?

CVE-2026-21945 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2026-21945?

Patch guidance is available from Oracle security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-21945.

Which products are affected by CVE-2026-21945?

1 product: Oracle Refer to Description.

Fix CVE-2026-21945 - HIGH Oracle Refer to Description

Description

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).

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-400

Metadata

Primary Vendor: ORACLE
Published: 1/20/2026
Last Modified: 1/21/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

Oracle : Refer to Description

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-21945. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-21945

View on NIST NVD

CVE-2026-21945 vulnerability