{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42580", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-28T17:26:12.085Z", "datePublished": "2026-05-13T18:04:03.690Z", "dateUpdated": "2026-05-14T18:21:13.322Z"}, "containers": {"cna": {"title": "Netty: HTTP Request Smuggling due to incorrect chunk size parsing", "problemTypes": [{"descriptions": [{"cweId": "CWE-444", "lang": "en", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723"}], "affected": [{"vendor": "netty", "product": "netty", "versions": [{"version": ">= 4.2.0.Alpha1, < 4.2.13.Final", "status": "affected"}, {"version": "< 4.1.133.Final", "status": "affected"}]}, {"vendor": "io.netty", "product": "netty-codec-http", "versions": [{"version": ">= 4.2.0.Alpha1, < 4.2.13.Final", "status": "affected"}, {"version": "< 4.1.133.Final", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-13T18:04:03.690Z"}, "descriptions": [{"lang": "en", "value": "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final."}], "source": {"advisory": "GHSA-m4cv-j2px-7723", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-14T18:21:08.229314Z", "id": "CVE-2026-42580", "options": [{"Exploitation": "poc"}, {"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": "2026-05-14T18:21:13.322Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-42580", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-14T18:21:08.229314Z"}}}], "references": [{"url": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-14T18:21:01.939Z"}}], "cna": {"title": "Netty: HTTP Request Smuggling due to incorrect chunk size parsing", "source": {"advisory": "GHSA-m4cv-j2px-7723", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "netty", "product": "netty", "versions": [{"status": "affected", "version": ">= 4.2.0.Alpha1, < 4.2.13.Final"}, {"status": "affected", "version": "< 4.1.133.Final"}]}, {"vendor": "io.netty", "product": "netty-codec-http", "versions": [{"status": "affected", "version": ">= 4.2.0.Alpha1, < 4.2.13.Final"}, {"status": "affected", "version": "< 4.1.133.Final"}]}], "references": [{"url": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723", "name": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-444", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-190", "description": "CWE-190: Integer Overflow or Wraparound"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-13T18:04:03.690Z"}}}, "cveMetadata": {"cveId": "CVE-2026-42580", "state": "PUBLISHED", "dateUpdated": "2026-05-14T18:21:13.322Z", "dateReserved": "2026-04-28T17:26:12.085Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-13T18:04:03.690Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final."}], "id": "CVE-2026-42580", "lastModified": "2026-05-14T19:16:35.967", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-13T19:17:23.490", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-444"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.2.0.Alpha1,4.2.13.Final)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,4.1.133.Final)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "netty-codec-http", "source": "cna", "vendor": "io.netty"}, "product": "netty-codec-http", "vendor": "io.netty"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.2.0.Alpha1,4.2.13.Final)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,4.1.133.Final)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "netty", "source": "cna", "vendor": "netty"}, "product": "netty", "vendor": "netty"}], "created": "2026-05-13T19:45:03.827542+00:00", "updated": "2026-05-14T14:34:08.758752+00:00", "vendors": ["io.netty", "io.netty$PRODUCT$netty-codec-http", "netty", "netty$PRODUCT$netty"]}