High severity · published Jan 20, 2026
CVE-2026-21945
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security)
7.5
CVSS
1%
EPSS
No
On KEV
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 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 interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OG
Oracle GraalVM for JDK · Oracle Corporation
17.0.17; 21.0.9 · source: vendor
OJ
Oracle Java SE · Oracle Corporation
8u471; 8u471-b50; 8u471-perf; 11.0.29; 17.0.17; 21.0.9; +1 more · source: vendor
GR
Graalvm · Oracle
21.3.16 · source: NVD
GF
Graalvm For Jdk · Oracle
17.0.17; 21.0.9 · source: NVD
JD
Jdk · Oracle
1.8.0; 1.8.0; 1.8.0; 11.0.29; 17.0.17; 21.0.9; +1 more · source: NVD
JR
Jre · Oracle
1.8.0; 1.8.0; 1.8.0; 11.0.29; 17.0.17; 21.0.9; +1 more · source: NVD
OE
OPENJDK ELS 11.0.30 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Build of OpenJDK 17.0.18 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Build of OpenJDK 21.0.10 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Build of OpenJDK 25.0.2 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Build of OpenJDK 8u482 · Red Hat
All versions, or not specified · source: CISA
Affected product
OG
Oracle GraalVM Enterprise Edition
Oracle Corporation
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