CVE-2026-44891

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{"bugzilla": {"description": "io.netty/netty-codec-stomp: Netty: Denial of Service vulnerability in STOMP decoder", "id": "2501958", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501958"}, "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": ["Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.stomp.StompSubframeDecoder fails to limit the total number of headers or their cumulative size per frame, and the maxLineLength parameter only restricts individual header lines. An attacker can send a large number of short headers that are accumulated in memory inside DefaultStompHeadersSubframe until the JVM throws an OutOfMemoryError, causing denial of service for servers exposing a STOMP endpoint based on StompSubframeDecoder. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.", "A flaw was found in Netty, a network application framework, specifically within the StompSubframeDecoder component. This vulnerability allows a remote attacker to cause a denial of service (DoS) by sending a large number of small headers. The decoder fails to properly limit the total number or cumulative size of headers per frame, leading to excessive memory consumption and ultimately crashing the server."], "mitigation": {"lang": "en:us", "value": "To reduce the risk of this denial of service, restrict network access to any services that expose a STOMP endpoint and use Netty's `StompSubframeDecoder`. Implement firewall rules or network access controls to permit connections only from trusted sources. This action limits the ability of untrusted remote clients to exploit the vulnerability."}, "name": "CVE-2026-44891", "package_state": [{"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Affected", "package_name": "netty-codec-stomp", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:8", "fix_state": "Affected", "package_name": "netty-codec-stomp", "product_name": "Red Hat Data Grid 8"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "package_name": "netty-codec-stomp", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Affected", "package_name": "netty-codec-stomp", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Fix deferred", "package_name": "netty-codec-stomp", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-07-17T20:16:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-44891\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-44891\nhttps://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b\nhttps://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6\nhttps://github.com/netty/netty/pull/17063\nhttps://github.com/netty/netty/pull/17065\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-vhch-2wf3-m8rp"], "statement": "This is an Important denial of service vulnerability in Netty's StompSubframeDecoder component. A remote, unauthenticated attacker can exploit this flaw by sending a large number of small headers to a server exposing a STOMP endpoint. This can lead to excessive memory consumption, causing an OutOfMemoryError and resulting in a complete denial of service for the affected application.", "threat_severity": "Important"}

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