CVE-2026-47891

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{"bugzilla": {"description": "org.springframework/spring-webflux: org.springframework/spring-web: Spring WebFlux: Denial of Service due to maxInMemorySize bypass", "id": "2524835", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524835"}, "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:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["A Spring WebFlux application that relies on the Aalto XML processor to parse XML input does not correctly enforce the maxInMemorySize limit.\nSpring Framework 7.0.0 - 7.0.8\nSpring Framework 6.2.0 - 6.2.19\nSpring Framework 6.1.0 - 6.1.28\nSpring Framework 6.0.0 - 6.0.30\nSpring Framework 5.3.0 - 5.3.49\nSpring Framework 5.2.25.RELEASE and earlier", "A flaw was found in Spring WebFlux applications that utilize the Aalto XML processor to parse XML input. A remote attacker could exploit this vulnerability by sending specially crafted XML, causing the application to bypass the maxInMemorySize limit. This can lead to excessive memory consumption, potentially resulting in a denial of service (DoS) condition for the application."], "mitigation": {"lang": "en:us", "value": "Not applicable to Red Hat products (not affected). Applications that do use Spring WebFlux with the Aalto XML processor should upgrade to a fixed Spring Framework release (7.0.9, 6.2.20, 6.1.29, 6.0.31, 5.3.50, or 5.2.26)."}, "name": "CVE-2026-47891", "package_state": [{"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Not affected", "package_name": "jenkins", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Not affected", "package_name": "ocp-tools-4/jenkins-rhel8", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Not affected", "package_name": "ocp-tools-4/jenkins-rhel9", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:camel_quarkus:3", "fix_state": "Not affected", "package_name": "spring-web", "product_name": "Red Hat build of Apache Camel 4 for Quarkus 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "xbean", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "javapackages-tools:201801/xbean", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "pki-core:10.6/resteasy", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "pki-deps:10.6/resteasy", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "resteasy", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "xbean", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Not affected", "package_name": "spring-web", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Not affected", "package_name": "spring-webflux", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Not affected", "package_name": "devspaces/openvsx-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Not affected", "package_name": "devspaces/pluginregistry-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Not affected", "package_name": "spring-web", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-08-27T05:21:39Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-47891\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-47891\nhttps://spring.io/security/cve-2026-47891"], "statement": "CVE-2026-47891 affects Spring Framework's WebFlux module only when an application uses the reactive WebFlux stack together with the Aalto XML processor (com.fasterxml:aalto-xml) to parse XML request bodies. Red Hat products ship spring-web/spring-webflux transitively as part of servlet-based (Spring MVC) or non-web integrations; none run the reactive WebFlux XML-decode path, and the Aalto XML processor is not shipped in any Red Hat product (verified across the portfolio). The vulnerable code path is therefore never in execution, and these products are not affected.", "threat_severity": "Important"}

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