{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-106452", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-06T16:49:40.591Z", "datePublished": "2026-10-06T19:52:37.818Z", "dateUpdated": "2026-10-07T10:45:18.010Z"}, "containers": {"cna": {"title": "yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header", "problemTypes": [{"descriptions": [{"cweId": "CWE-789", "lang": "en", "description": "CWE-789: Memory Allocation with Excessive Size Value", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464"}, {"name": "https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634", "tags": ["x_refsource_MISC"], "url": "https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634"}, {"name": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.2"}], "affected": [{"vendor": "yawkat", "product": "lz4-java", "versions": [{"version": "< 1.11.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-06T19:52:37.818Z"}, "descriptions": [{"lang": "en", "value": "yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill() validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data, allowing a header-only stream to request a near-2 GiB allocation and exhaust the JVM heap. Canonical writers emit raw blocks when compression is not smaller than the original block, but vulnerable readers accept non-canonical oversized compressed blocks. This issue is fixed in version 1.11.2."}], "source": {"advisory": "GHSA-4v53-57pg-c464", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-07T10:45:08.750360Z", "id": "CVE-2026-106452", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-07T10:45:18.010Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-106452", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-07T10:45:08.750360Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-07T10:45:14.297Z"}}], "cna": {"title": "yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header", "source": {"advisory": "GHSA-4v53-57pg-c464", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "yawkat", "product": "lz4-java", "versions": [{"status": "affected", "version": "< 1.11.2"}]}], "references": [{"url": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464", "name": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634", "name": "https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.2", "name": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.2", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill() validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data, allowing a header-only stream to request a near-2 GiB allocation and exhaust the JVM heap. Canonical writers emit raw blocks when compression is not smaller than the original block, but vulnerable readers accept non-canonical oversized compressed blocks. This issue is fixed in version 1.11.2."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-789", "description": "CWE-789: Memory Allocation with Excessive Size Value"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-06T19:52:37.818Z"}}}, "cveMetadata": {"cveId": "CVE-2026-106452", "state": "PUBLISHED", "dateUpdated": "2026-10-07T10:45:18.010Z", "dateReserved": "2026-10-06T16:49:40.591Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-10-06T19:52:37.818Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "lz4-java", "vendor": "yawkat", "versions": [{"status": "affected", "version": "< 1.11.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill() validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data, allowing a header-only stream to request a near-2 GiB allocation and exhaust the JVM heap. Canonical writers emit raw blocks when compression is not smaller than the original block, but vulnerable readers accept non-canonical oversized compressed blocks. This issue is fixed in version 1.11.2."}], "id": "CVE-2026-106452", "lastModified": "2026-10-07T13:58:29.527", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-106452", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-07T10:45:08.750360Z", "version": "2.0.3"}}]}, "published": "2026-10-06T20:17:27.317", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634"}, {"source": "security-advisories@github.com", "url": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "org.lz4/lz4-java: lz4-java: Denial of Service via excessive memory allocation", "id": "2547136", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547136"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-770", "details": ["A flaw was found in lz4-java. A remote attacker can trigger a Denial of Service (DoS) by providing a crafted compressed data stream with an oversized block header. During decompression, the input stream allocates memory based on this attacker-controlled size field before reading the actual payload, which can exhaust available Java Virtual Machine (JVM) memory and crash the application."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-106452", "package_state": [{"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:debezium:3", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat build of Debezium 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "jmc", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Out of support scope", "package_name": "lz4-java", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-spark-operator-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th06-cpu-torch210-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th06-cuda130-torch210-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th06-rocm64-torch291-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th-torch-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th-torch-cuda-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-10-06T19:52:37Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-106452\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-106452\nhttps://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634\nhttps://github.com/yawkat/lz4-java/releases/tag/v1.11.2\nhttps://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464"], "statement": "This vulnerability is rated as Moderate impact for Red Hat environments because successful exploitation is confined to application denial of service through heap exhaustion, without enabling unauthorized code execution or compromising data confidentiality. Across Red Hat products where this library is embedded, such as middleware runtimes and containerized AI tooling, data streams are generally consumed from authenticated or trusted pipelines rather than arbitrary external endpoints. Triggering the flaw requires an application to process untrusted compressed input using legacy block stream processing, limiting the overall risk profile under standard operational deployments.", "threat_severity": "Moderate"}