{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-22018", "assignerOrgId": "43595867-4340-4103-b7a2-9a5208d29a85", "state": "PUBLISHED", "assignerShortName": "oracle", "dateReserved": "2026-01-05T18:07:34.728Z", "datePublished": "2026-04-21T20:35:11.445Z", "dateUpdated": "2026-04-21T20:35:11.445Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "43595867-4340-4103-b7a2-9a5208d29a85", "shortName": "oracle", "dateUpdated": "2026-04-21T20:35:11.445Z"}, "problemTypes": [{"descriptions": [{"lang": "en-US", "description": "Difficult to exploit 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."}]}], "affected": [{"vendor": "Oracle Corporation", "product": "Oracle Java SE", "versions": [{"version": "8u481", "status": "affected"}, {"version": "8u481-b50", "status": "affected"}, {"version": "8u481-perf", "status": "affected"}, {"version": "11.0.30", "status": "affected"}, {"version": "17.0.18", "status": "affected"}, {"version": "21.0.10", "status": "affected"}, {"version": "25.0.2", "status": "affected"}, {"version": "26", "status": "affected"}]}, {"vendor": "Oracle Corporation", "product": "Oracle GraalVM for JDK", "versions": [{"version": "17.0.18", "status": "affected"}, {"version": "21.0.10", "status": "affected"}]}, {"vendor": "Oracle Corporation", "product": "Oracle GraalVM Enterprise Edition", "versions": [{"version": "21.3.17", "status": "affected"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:8u481:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:*:*:*:*:*:*:*:*", "versionStartIncluding": "8u481", "versionEndIncluding": "b50"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:8u481:*:*:*:enterprise_performance:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:11.0.30:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:17.0.18:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:21.0.10:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:25.0.2:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:java_se:26:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:graalvm_for_jdk:17.0.18:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:graalvm_for_jdk:21.0.10:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:graalvm:21.3.17:*:*:*:enterprise:*:*:*"}]}]}], "descriptions": [{"lang": "en-US", "value": "Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 8u481, 8u481-b50, 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. Difficult to exploit 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 3.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)."}], "references": [{"url": "https://www.oracle.com/security-alerts/cpuapr2026.html", "name": "Oracle Advisory", "tags": ["vendor-advisory"]}], "metrics": [{"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW", "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "baseScore": 3.7, "baseSeverity": "LOW"}}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 8u481, 8u481-b50, 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. Difficult to exploit 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 3.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)."}], "id": "CVE-2026-22018", "lastModified": "2026-04-21T21:16:28.833", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "secalert_us@oracle.com", "type": "Primary"}]}, "published": "2026-04-21T21:16:28.833", "references": [{"source": "secalert_us@oracle.com", "url": "https://www.oracle.com/security-alerts/cpuapr2026.html"}], "sourceIdentifier": "secalert_us@oracle.com", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "21.3.17"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Oracle GraalVM Enterprise Edition", "source": "cna", "vendor": "Oracle Corporation"}, "product": "graalvm", "vendor": "oracle"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "17.0.18"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "21.0.10"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Oracle GraalVM for JDK", "source": "cna", "vendor": "Oracle Corporation"}, "product": "graalvm_for_jdk", "vendor": "oracle"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "8u481"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "8u481-b50"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "8u481-perf"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "11.0.30"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "17.0.18"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "21.0.10"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "25.0.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "26"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Oracle Java SE", "source": "cna", "vendor": "Oracle Corporation"}, "product": "java_se", "vendor": "oracle"}], "analysis": {"en": {"generated_at": "2026-04-22T05:13:05.322604+00:00", "value": {"mitigation_remediation": ["Apply the latest Oracle patch or upgrade to a non\u2011affected version of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition as detailed in Oracle CPU Apr 2026 advisory.", "If a patch cannot be applied immediately, isolate the affected servers behind a firewall and restrict inbound traffic to the specific APIs that use the vulnerable libraries.", "Enable the Java Application Security Manager or enforce sandbox restrictions for Java Web Start applications and applets so that untrusted code cannot be loaded from external sources."], "summary": {"action": "Patch", "impact": "Partial Denial of Service (Availability)"}, "threat_synthesis": {"affected_systems": "Affected vendors include Oracle Corporation. The vulnerable products are Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. Versions that can be compromised are Java SE 8u481, 8u481\u2011b50, 8u481\u2011perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, and 26; GraalVM for JDK 17.0.18 and 21.0.10; and GraalVM Enterprise Edition 21.3.17.", "description_and_impact": "A vulnerability in the Libraries component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition allows an unauthenticated attacker who has network access to exploit APIs available through multiple protocols. Successful exploitation can cause a partial denial of service, disrupting application availability but not compromising confidentiality or integrity. The weakness is similar to a resource exhaustion or availability control failure, as it is broadly described as \"partial DOS\" based on usage of vulnerable APIs.", "risk_and_exploitability": "The CVSS score of 3.7 indicates a low\u2011to\u2011moderate severity. The attack vector is Network, with high attack complexity, no prerequisites, and no user interaction required. While EPSS data is not available and the vulnerability is not listed in the CISA KEV catalog, the fact that it can be triggered without authentication and across multiple protocols raises the likelihood of exploitation for organizations that expose Java services to the internet. If exploited, an attacker can disrupt services, potentially affecting end\u2011users or downstream systems that rely on the affected Java components."}}}}, "created": "2026-04-22T03:00:06.747507+00:00", "title": "Unauthenticated Partial Denial of Service via API in Oracle Java SE and GraalVM", "updated": "2026-04-22T05:15:06.074277+00:00", "vendors": ["oracle", "oracle$PRODUCT$graalvm", "oracle$PRODUCT$graalvm_for_jdk", "oracle$PRODUCT$java_se"], "weaknesses": ["CWE-754"]}