{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-44249", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-05T16:33:55.844Z", "datePublished": "2026-06-11T20:46:14.110Z", "dateUpdated": "2026-09-03T12:04:39.292Z" }, "containers": { "cna": { "title": "Netty has an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-284", "lang": "en", "description": "CWE-284: Improper Access Control", "type": "CWE" } ] }, { "descriptions": [ { "cweId": "CWE-697", "lang": "en", "description": "CWE-697: Incorrect Comparison", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" } } ], "references": [ { "name": "https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86" }, { "name": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final" }, { "name": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final" } ], "affected": [ { "vendor": "netty", "product": "netty", "versions": [ { "version": ">= 4.2.0.Final, < 4.2.15.Final", "status": "affected" }, { "version": "< 4.1.135.Final", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-11T20:46:14.110Z" }, "descriptions": [ { "lang": "en", "value": "Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue." } ], "source": { "advisory": "GHSA-3qp7-7mw8-wx86", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-06-12T00:00:00+00:00", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-44249" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-13T03:55:45.263Z" } }, { "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 Hat", "versions": [ { "lessThan": "*", "status": "unaffected", "version": "4.2.0-13", "versionType": "rpm" } ] }, { "collectionURL": 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"https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:satellite:6" ], "defaultStatus": "unaffected", "packageName": "candlepin", "product": "Red Hat Satellite 6", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:satellite:6" ], "defaultStatus": "unaffected", "packageName": "satellite:el8/candlepin", "product": "Red Hat Satellite 6", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:red_hat_single_sign_on:7" ], "defaultStatus": "unaffected", "packageName": "netty-handler", "product": "Red Hat Single Sign-On 7", "vendor": "Red Hat" } ], "datePublic": "2026-06-11T20:46:14.110Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in netty-handler, a component of the Netty network application framework. A remote attacker can exploit an incorrect masking operation in the IpSubnetFilterRule.compareTo() function to bypass configured IPv6 subnet rules. This allows valid public IP addresses to circumvent intended network restrictions, potentially leading to unauthorized access or exposure of services." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-1287", "description": "Improper Validation of Specified Type of Input", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-44249" }, { "name": "RHBZ#2488081", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488081" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44249.json" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:49700" }, { "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-2026:48151" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:26586" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:41951" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": 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Platform 8.1.7.GA" }, { "lang": "en", "value": "RHSA-2026:28573: Red Hat Offline Knowledge Portal 1.2.12" }, { "lang": "en", "value": "RHSA-2026:48124: Red Hat OpenShift Dev Spaces 3.29" }, { "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-2026:26018: Red Hat build of Quarkus 3.27.4.SP1" }, { "lang": "en", "value": "RHSA-2026:26017: Red Hat build of Quarkus 3.33.2.SP1" }, { "lang": "en", "value": "RHSA-2026:34608: Streams for Apache Kafka 2.9.4" }, { "lang": "en", "value": "RHSA-2026:54435: Streams for Apache Kafka 3.2.1" } ], "timeline": [ { "lang": "en", "time": "2026-06-11T22:02:05.327Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-06-11T20:46:14.110Z", "value": "Made public." } ], "title": "netty-handler: netty-handler: IPv6 subnet rule bypass due to incorrect masking operation", "workarounds": [ { "lang": "en", "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." } ], "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-09-03T12:04:39.292Z" } } ] } }