{"answers":{"affected":"4 open source packages ship an affected version, including io.netty:netty-codec-http. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-56745 in the wild and no public exploit code.","fix":"Upgrade io.netty:netty-codec-http to a fixed version for your release line: 4.1.136.Final or 4.2.16.Final.","what":"CVE-2026-56745 is a high-severity denial of service vulnerability in Netty Netty, published on 21 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-2026-56745 and fix it if it is affected.\n\nWhat it is: CVE-2026-56745 is a high-severity denial of service vulnerability in Netty Netty, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-56745 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.netty:netty-codec-http (Maven): affected from 4.1.0.Final; fixed in 4.1.136.Final\n- io.netty:netty-codec-http (Maven): affected from 4.1.0.Final; fixed in 4.1.136.Final\n- io.netty:netty-codec-http (Maven): affected from 4.2.0.Final; fixed in 4.2.16.Final\n- io.netty:netty-codec-http (Maven): affected from 4.2.0.Final; 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-2026-56745/ (Markdown: https://insights.sbomify.com/CVE-2026-56745/index.md)","id":"CVE-2026-56745","markdown":"https://insights.sbomify.com/CVE-2026-56745/index.md","name":"CVE-2026-56745","record":{"aliases":["CLEANSTART-2026-EG79698","CLEANSTART-2026-KG33218","CLEANSTART-2026-KM44899","CLEANSTART-2026-PM11984","CLEANSTART-2026-XB82497","DEBIAN-CVE-2026-56745","ECHO-440e-bb87-aa81","GHSA-jppx-w49h-x2qq","MINI-245g-vvcv-c924","MINI-2737-cw4c-hvpq","MINI-2cv7-7mr4-whjq","MINI-2f4v-jj4h-883f","MINI-2gq9-c9qj-x8jw","MINI-2h4w-q89c-rx66","MINI-2r5m-hfch-r5vv","MINI-2wxx-894f-jvfr","MINI-3qq9-23jp-95h3","MINI-478m-r577-hr5c","MINI-4whp-7v8x-wrw6","MINI-4x84-3c8w-x6r7","MINI-597r-xj2h-v8m8","MINI-5cx7-gg65-559h","MINI-5hcg-wfpf-pwh2","MINI-5jhq-4wr3-gp32","MINI-6435-6q83-h484","MINI-67hc-8rgx-g8wx","MINI-69gp-c75h-w3j6","MINI-6f3h-j32w-j7wr","MINI-6g64-gq9w-8rcv","MINI-6jw5-76qp-qm56","MINI-6pxf-6cq6-hvgj","MINI-6wjp-9j2r-x68g","MINI-76xf-rp8x-qfc6","MINI-783x-j4gx-qwr7","MINI-79hm-hwqm-g58j","MINI-7cv7-fv3w-m968","MINI-7mq7-c29c-wqw4","MINI-7p65-pqm3-gq3r","MINI-8364-xx59-49c4","MINI-8753-qgvw-f678","MINI-8946-2pxp-4753","MINI-89v4-gj6v-pgx2","MINI-8cw3-w9pq-xxg3","MINI-8mf6-f4h9-927g","MINI-8q8p-2gq3-jrh7","MINI-944v-ww8v-mr65","MINI-95qx-q37m-qm2r","MINI-9848-xrhq-282p","MINI-9f4j-j43m-7575","MINI-9fvr-m7h8-fv53","MINI-9jgr-3fqv-vmqw","MINI-9jhr-chwj-m6vm","MINI-9p9r-443j-7jp3","MINI-9r8h-jw9f-88v3","MINI-9r95-2j75-59pc","MINI-c355-48q9-4g9m","MINI-c97g-62rg-3wgg","MINI-c9qm-jq8g-5v6j","MINI-ch66-m54h-wgq3","MINI-cr86-2j55-qmx9","MINI-f4m2-mp2p-c73v","MINI-f5vq-p9r6-8f54","MINI-fcgx-2rcr-p3x5","MINI-fcw4-mh7m-hpqq","MINI-frq8-jpqw-wmhh","MINI-g3mq-v588-8v3j","MINI-g8cm-5r2f-672m","MINI-g9cw-frr8-mffr","MINI-gh3x-qhm6-frwc","MINI-gvgw-4p3c-mh9v","MINI-gx48-r38x-7cv2","MINI-h54m-9m4g-9438","MINI-h83m-5356-6jfp","MINI-h9xf-m6wv-jr5j","MINI-hch6-8xf3-jrjf","MINI-hjmx-4v7c-qhh3","MINI-hwmr-jc22-3833","MINI-hxfw-w52x-92q5","MINI-j4g9-522g-xw58","MINI-j7xw-p6h8-j966","MINI-jf28-wf8g-7473","MINI-jvgv-2g4p-2h65","MINI-m4g9-426m-3c92","MINI-m5wc-hxx4-mrwx","MINI-mm73-58w6-8h2h","MINI-mr98-5pv4-9672","MINI-mxxg-vvhx-vhf5","MINI-p2j6-pm2c-6r47","MINI-p3wp-63cw-9cw2","MINI-p4vx-gvwx-2grh","MINI-p663-qgcx-32gv","MINI-p9fx-596f-7c8v","MINI-pf7g-36gv-3f25","MINI-pm3f-7q59-mhf6","MINI-ppwc-r463-2h8j","MINI-pv7p-452v-844x","MINI-q669-947h-rrjf","MINI-q9m4-gv6g-h392","MINI-qwfv-vv6f-qvgr","MINI-qwqf-c2rp-pqq9","MINI-r65f-3367-rvfx","MINI-r8rr-4mcq-3495","MINI-v57h-x453-x37p","MINI-v62w-wv9f-6m25","MINI-v662-f5x6-j5pr","MINI-vcqh-5fcx-h839","MINI-w46c-6rww-6hrh","MINI-w6xv-h9m5-f2qx","MINI-w8hj-x3cj-xwc9","MINI-wf6h-grw7-rmrj","MINI-wq3r-4q2p-qg67","MINI-wxpc-f73q-f5mv","MINI-x59r-63mh-m5gf","ROOT-APP-MAVEN-CVE-2026-56745","UBUNTU-CVE-2026-56745"],"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":"A remote attacker can cause native memory exhaustion and denial of service by triggering a ByteBuf reference leak in the Netty SPDY decoder.","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":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the `SpdyHttpDecoder` handler in Netty's SPDY-to-HTTP codec allocates a pooled `ByteBuf` when processing a client-initiated `SYN_STREAM` frame with `FLAG_FIN=0` and stores the partially constructed `FullHttpRequest` in `messageMap`; when the remote peer sends `RST_STREAM` for that stream or the accumulated content exceeds `maxContentLength`, the decoder removes the entry but does not release the pooled `ByteBuf`, causing native memory exhaustion. 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":"none_known"},"has_fix":true,"headline":"Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion","id":"CVE-2026-56745","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":5,"next":{"headline":"Netty has a Security Control Bypass via CORS Short-Circuit Failure","id":"CVE-2026-56746"},"packages":[{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["4.1.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":null,"source":"GHSA-jppx-w49h-x2qq"},{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["4.1.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":"pkg:maven/io.netty/netty-codec-http","source":"GHSA-jppx-w49h-x2qq"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":null,"source":"GHSA-jppx-w49h-x2qq"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":"pkg:maven/io.netty/netty-codec-http","source":"GHSA-jppx-w49h-x2qq"}],"prev":{"headline":"`@bsv/wallet-toolbox` / `-client` / `-mobile` don't verify storage-supplied recipient output scripts against caller-requested outputs in createAction","id":"CVE-2026-56744"},"products":["netty"],"published":"2026-07-21","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 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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-22","vendors":["netty"]},"summary":"A remote attacker can cause native memory exhaustion and denial of service by triggering a ByteBuf reference leak in the Netty SPDY decoder.","url":"https://insights.sbomify.com/CVE-2026-56745/"}