{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-42584", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-28T17:26:12.086Z", "datePublished": "2026-05-13T18:10:48.437Z", "dateUpdated": "2026-08-21T12:13:05.400Z" }, "containers": { "cna": { "title": "Netty: HttpClientCodec response desynchronization", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-444", "lang": "en", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1" } } ], "references": [ { "name": "https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3" } ], "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": "2026-05-13T18:10:48.437Z" }, "descriptions": [ { "lang": "en", "value": "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll() once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103, then 200 with GET body, then 200 for HEAD, the queue pairs HEAD with the first 200. The HEAD rule then skips reading that message’s body, so the GET entity bytes stay on the stream and the following 200 is parsed from the wrong offset. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final." } ], "source": { "advisory": "GHSA-57rv-r2g8-2cj3", "discovery": "UNKNOWN" } }, "adp": [ { "references": [ { "url": "https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3", "tags": [ "exploit" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-05-13T18:35:01.642953Z", "id": "CVE-2026-42584", "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": "2026-05-13T18:35:05.734Z" } }, { "affected": [ { "collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": [ "cpe:/a:redhat:cryostat:4::el9" ], "defaultStatus": "affected", "packageName": "cryostat/cryostat-reports-rhel9", "product": "Cryostat 4 on RHEL 9", "vendor": "Red 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"vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:red_hat_single_sign_on:7" ], "defaultStatus": "affected", "packageName": "netty-codec-http", "product": "Red Hat Single Sign-On 7", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:amq_streams:2" ], "defaultStatus": "unaffected", "packageName": "netty-codec-http", "product": "streams for Apache Kafka 2", "vendor": "Red Hat" } ], "datePublic": "2026-05-13T18:10:48.437Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in Netty, an asynchronous, event-driven network application framework. A remote attacker could exploit this vulnerability by sending a specific sequence of HTTP responses (103, followed by a 200 with a GET body, then another 200 for a HEAD request) when the client pipelines GET then HEAD requests. This can cause the HttpClientCodec to incorrectly pair responses, leading to subsequent HTTP responses being parsed from the wrong offset. This issue may result in information disclosure or other data integrity problems due to misinterpretation of network traffic." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-444", "description": "Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-42584" }, { "name": "RHBZ#2477224", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477224" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42584.json" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:53644" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:28010" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:53806" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:42644" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:25123" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:36820" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:37390" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:23808" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:24502" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:54435" } ], "solutions": [ { "lang": "en", "value": "RHSA-2026:53644: Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server" }, { "lang": "en", "value": "RHSA-2026:28010: Cryostat 4 on RHEL 9" }, { "lang": "en", "value": "RHSA-2026:53806: Red Hat JBoss Enterprise Application Platform 7.4.25" }, { "lang": "en", "value": "RHSA-2026:42644: Red Hat OpenShift AI 2.25" }, { "lang": "en", "value": "RHSA-2026:25123: Red Hat OpenShift Dev Spaces 3.28" }, { "lang": "en", "value": "RHSA-2026:36820: Red Hat OpenShift Dev Spaces 3.29" }, { "lang": "en", "value": "RHSA-2026:37390: Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16" }, { "lang": "en", "value": "RHSA-2026:23808: Red Hat build of Quarkus 3.27.4" }, { "lang": "en", "value": "RHSA-2026:24502: Red Hat build of Quarkus 3.33.2" }, { "lang": "en", "value": "RHSA-2026:54435: Streams for Apache Kafka 3.2.1" } ], "timeline": [ { "lang": "en", "time": "2026-05-13T19:01:51.846Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-05-13T18:10:48.437Z", "value": "Made public." } ], "title": "netty: io.netty/netty-codec-http: Netty: Incorrect HTTP response parsing leads to data confusion", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-08-21T12:13:05.400Z" } } ] } }