CVE-2026-21945 (GCVE-0-2026-21945)

Vulnerability from cvelistv5 – Published: 2026-01-20 21:56 – Updated: 2026-05-12 12:08
VLAI
Summary
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).
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • 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.
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
Oracle Corporation Oracle Java SE Affected: 8u471
Affected: 8u471-b50
Affected: 8u471-perf
Affected: 11.0.29
Affected: 17.0.17
Affected: 21.0.9
Affected: 25.0.1
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Oracle Corporation Oracle GraalVM for JDK Affected: 17.0.17
Affected: 21.0.9
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Oracle Corporation Oracle GraalVM Enterprise Edition Affected: 21.3.16
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Siemens SIMATIC CN 4100 Affected: 0 , < V5.0 (custom)
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Show details on NVD website
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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).\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"description\": \"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.\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:oracle:java_se:8u471:*:*:*:*:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:java_se:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndIncluding\": \"b50\", \"versionStartIncluding\": \"8u471\"}, {\"criteria\": \"cpe:2.3:a:oracle:java_se:8u471:*:*:*:enterprise_performance:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:java_se:11.0.29:*:*:*:*:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:java_se:17.0.17:*:*:*:*:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:java_se:21.0.9:*:*:*:*:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:java_se:25.0.1:*:*:*:*:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:graalvm_for_jdk:17.0.17:*:*:*:*:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:graalvm_for_jdk:21.0.9:*:*:*:*:*:*:*\", \"vulnerable\": true}, {\"criteria\": \"cpe:2.3:a:oracle:graalvm:21.3.16:*:*:*:enterprise:*:*:*\", \"vulnerable\": true}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"43595867-4340-4103-b7a2-9a5208d29a85\", \"shortName\": \"oracle\", \"dateUpdated\": \"2026-01-20T21:56:27.997Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-21945\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-21T15:05:36.940Z\", \"dateReserved\": \"2026-01-05T18:07:34.712Z\", \"assignerOrgId\": \"43595867-4340-4103-b7a2-9a5208d29a85\", \"datePublished\": \"2026-01-20T21:56:27.997Z\", \"assignerShortName\": \"oracle\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.