CVE-2026-47021

MEDIUM

Oracle Java SE - Denial of Service

Title source: rule
STIX 2.1

Description

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: 2D). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18. 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 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 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
Oracle Advisory
https://www.oracle.com/security-alerts/cpujul2026.html

Scores

CVSS v3 5.3
EPSS 0.0029
EPSS Percentile 21.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (10)
Oracle Corporation/Oracle GraalVM Enterprise Edition 21.3.18
Oracle Corporation/Oracle GraalVM for JDK 17.0.19
Oracle Corporation/Oracle GraalVM for JDK 21.0.11
Oracle Corporation/Oracle Java SE 11.0.31
Oracle Corporation/Oracle Java SE 17.0.19
Oracle Corporation/Oracle Java SE 21.0.11
Oracle Corporation/Oracle Java SE 25.0.3
Oracle Corporation/Oracle Java SE 26.0.1
Oracle Corporation/Oracle Java SE 8u491
Oracle Corporation/Oracle Java SE 8u491-perf
Published Jul 21, 2026
Tracked Since Jul 22, 2026