CVE-2026-56817

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{"bugzilla": {"description": "io.netty/netty-codec-xml: Netty: Information disclosure via XML External Entity (XXE) vulnerability", "id": "2505975", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2505975"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-611", "details": ["A flaw was found in Netty, a network application framework. A remote attacker could exploit this vulnerability by sending specially crafted XML data containing a DOCTYPE declaration to a vulnerable XmlDecoder within the Netty channel pipeline. This can lead to an XML External Entity (XXE) vulnerability, potentially allowing the attacker to disclose sensitive information from the system."], "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-2026-56817", "package_state": [{"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Affected", "impact": "important", "package_name": "netty-codec-xml", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:8", "fix_state": "Affected", "impact": "important", "package_name": "netty-codec-xml", "product_name": "Red Hat Data Grid 8"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "eap74-els-openjdk11-openshift-rhel8/eap74-els-openjdk11-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "eap74-els-openjdk17-openshift-rhel8/eap74-els-openjdk17-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "eap74-els-openjdk8-openshift-rhel8/eap74-els-openjdk8-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "jboss-eap-7-eap74-els-openjdk17-openshift-rhel8/jboss-eap-7-eap74-els-openjdk17-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "jboss-eap-7-eap74-els-openjdk8-openshift-rhel8/jboss-eap-7-eap74-els-openjdk8-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "netty-codec-xml", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Affected", "impact": "important", "package_name": "netty-codec-xml", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "netty-codec-xml", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-07-21T22:06:56Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56817\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56817\nhttps://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b\nhttps://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6\nhttps://github.com/netty/netty/releases/tag/netty-4.1.136.Final\nhttps://github.com/netty/netty/releases/tag/netty-4.2.16.Final\nhttps://github.com/netty/netty/security/advisories/GHSA-4qhr-g3c6-fcfx"], "statement": "This Important flaw in Netty's `XmlDecoder` component allows for XML External Entity (XXE) injection. When a Netty channel pipeline processes XML data with a `DOCTYPE` declaration via an `AsyncXMLInputFactory` that lacks proper security configuration, a remote attacker could potentially disclose sensitive information. The exploitability is conditional, relying on the specific behavior of the Aalto XML async parser.", "threat_severity": "Important"}

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