{"answers":{"affected":"4 open source packages ship an affected version, including io.netty:netty-codec-stomp. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44891 exists.","fix":"Upgrade io.netty:netty-codec-stomp to a fixed version for your release line: 4.1.136.Final or 4.2.16.Final.","what":"CVE-2026-44891 is a high-severity denial of service vulnerability in Netty Netty, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-44891 and fix it if it is affected.\n\nWhat it is: CVE-2026-44891 is a high-severity denial of service vulnerability in Netty Netty, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44891 exists.\n\nAffected packages and fixed versions:\n- io.netty:netty-codec-stomp (Maven): affected all versions; fixed in 4.1.136.Final\n- io.netty:netty-codec-stomp (Maven): affected all versions; fixed in 4.1.136.Final\n- io.netty:netty-codec-stomp (Maven): affected from 4.2.0.Alpha1; fixed in 4.2.16.Final\n- io.netty:netty-codec-stomp (Maven): affected from 4.2.0.Alpha1; fixed in 4.2.16.Final\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-44891/ (Markdown: https://insights.sbomify.com/CVE-2026-44891/index.md)","id":"CVE-2026-44891","markdown":"https://insights.sbomify.com/CVE-2026-44891/index.md","name":"CVE-2026-44891","record":{"aliases":["CLEANSTART-2026-WN14447","CLEANSTART-2026-XB76941","CLEANSTART-2026-YM67930","DEBIAN-CVE-2026-44891","ECHO-7228-fe24-aad3","GHSA-vhch-2wf3-m8rp","MINI-2qcr-8p2v-x9vj","MINI-63qw-j7w6-hq77","MINI-9h6m-257w-jr6p","MINI-c3wg-hvpq-vpmh","MINI-cjgc-mjj5-c5w4","MINI-fjr3-mxw8-r5c8","MINI-pfh6-4gcv-w5j7","MINI-q4rh-2vv4-ccxq","MINI-qcfq-wqx5-jc9r","MINI-w48j-fvff-j4h2","UBUNTU-CVE-2026-44891"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Java network framework","requires_auth":"none","summary":"Attackers can cause denial of service in STOMP servers by sending unbounded headers, exhausting memory in the Netty library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"netty","vendor":"netty"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"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.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Netty: Denial of Service via Unbounded Headers in StompSubframeDecoder","id":"CVE-2026-44891","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"netty:netty","products":["netty:netty"],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":7,"next":{"headline":"Netty has a Vulnerable Default Configuration Which Leads to Denial of Service via Unbounded HTTP/3 Header Size","id":"CVE-2026-44892"},"packages":[{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-stomp","purl":null,"source":"GHSA-vhch-2wf3-m8rp"},{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-stomp","purl":"pkg:maven/io.netty/netty-codec-stomp","source":"GHSA-vhch-2wf3-m8rp"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Alpha1"],"last_affected":[],"package":"io.netty:netty-codec-stomp","purl":null,"source":"GHSA-vhch-2wf3-m8rp"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Alpha1"],"last_affected":[],"package":"io.netty:netty-codec-stomp","purl":"pkg:maven/io.netty/netty-codec-stomp","source":"GHSA-vhch-2wf3-m8rp"}],"prev":{"headline":"Netty has Unbounded Direct Memory Consumption in its RedisDecoder","id":"CVE-2026-44890"},"products":["netty"],"published":"2026-07-17","related":[{"cvss_score":9.1,"headline":"Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext","id":"CVE-2026-75595","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.7,"headline":"Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing","id":"CVE-2026-75596","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.7,"headline":"Netty Bzip2Decoder: Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang","id":"CVE-2026-59901","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":8.7,"headline":"Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion","id":"CVE-2026-55851","kev_date_added":null,"published":"2026-07-21"},{"cvss_score":8.7,"headline":"Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion","id":"CVE-2026-56745","kev_date_added":null,"published":"2026-07-21"},{"cvss_score":8.7,"headline":"Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records","id":"CVE-2026-45674","kev_date_added":null,"published":"2026-06-12"},{"cvss_score":8.7,"headline":"Netty has Insufficient Bailiwick Validation for NS Records","id":"CVE-2026-47691","kev_date_added":null,"published":"2026-06-12"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-20","vendors":["netty"]},"summary":"Attackers can cause denial of service in STOMP servers by sending unbounded headers, exhausting memory in the Netty library.","url":"https://insights.sbomify.com/CVE-2026-44891/"}