{"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-2026-56746 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-2026-56746 is a medium-severity vulnerability in Netty Netty, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-56746 and fix it if it is affected.\n\nWhat it is: CVE-2026-56746 is a medium-severity vulnerability in Netty Netty, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-56746 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.netty:netty-codec-http (Maven): affected all versions; fixed in 4.1.136.Final\n- io.netty:netty-codec-http (Maven): affected all versions; 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-2026-56746/ (Markdown: https://insights.sbomify.com/CVE-2026-56746/index.md)","id":"CVE-2026-56746","markdown":"https://insights.sbomify.com/CVE-2026-56746/index.md","name":"CVE-2026-56746","record":{"aliases":["CLEANSTART-2026-BA81930","CLEANSTART-2026-DA58471","CLEANSTART-2026-MB96897","CLEANSTART-2026-QY68348","CLEANSTART-2026-YD90656","DEBIAN-CVE-2026-56746","ECHO-b05f-30e8-0c48","GHSA-6cqp-g7gg-8hr5","MINI-28x3-qxv2-jvc7","MINI-2cqw-wr9j-q9h9","MINI-2g3x-q7j5-qr7p","MINI-34rr-v9pg-2945","MINI-35vx-g6cr-j935","MINI-39w5-fc24-8hc5","MINI-3f49-m9fh-wv3m","MINI-3f7v-9xxh-rv8f","MINI-3r39-vhr8-gxj3","MINI-3rq9-8rw3-p9q7","MINI-435h-9p6x-2mrj","MINI-46hq-5rpv-cf7r","MINI-47hv-wcf9-gx8h","MINI-4w47-mh57-gc3q","MINI-585f-6p44-2jh3","MINI-586h-682f-p596","MINI-58h4-84jp-wh4c","MINI-5q3h-wxw6-wj3c","MINI-5rff-gxq9-g7m3","MINI-5rxf-795p-xfwp","MINI-65gp-rxfr-rmh3","MINI-694j-8v83-w924","MINI-6cfp-pmjq-wf3w","MINI-6cmj-xhvw-phqx","MINI-76hm-9cm3-5rrw","MINI-7898-hf76-639x","MINI-79vj-j379-j9gj","MINI-7pp4-q3c6-7vj4","MINI-7px6-cwm7-g8w4","MINI-7qv2-h6fr-f9vq","MINI-7w53-323q-wm79","MINI-83gr-wxjr-5rjv","MINI-84vj-4rfr-4rr9","MINI-86p6-9rm3-772x","MINI-8jr3-5992-25f3","MINI-92rf-jmjm-8x8r","MINI-94gr-hgpv-x9ff","MINI-9fr9-xcw3-4h4m","MINI-9jvf-gp7c-mwmx","MINI-9m9r-858q-hfc4","MINI-9v6q-j5p8-46hh","MINI-9v85-375r-73f3","MINI-9xm4-wpf8-xmmj","MINI-ch9q-pqh8-4qvf","MINI-cmfx-7qq7-r4vj","MINI-cq3w-v855-c76h","MINI-cq5w-9qgv-g48g","MINI-f33w-v959-5r6j","MINI-f8r9-mh84-mg86","MINI-f9qj-7766-pmp5","MINI-ffhh-vfwr-834f","MINI-fhjj-hh67-pxj4","MINI-fq7p-65hf-8chg","MINI-fr5q-4qv2-wv5r","MINI-g5p8-5r4f-2c6h","MINI-gcc8-c7gr-r2fj","MINI-gf45-288h-8f86","MINI-gm6m-w9cr-hxhh","MINI-h2wh-qrq2-chh2","MINI-h67g-3v6j-6hq7","MINI-h6wf-wmrm-4r5f","MINI-hjf2-gjmg-c2fr","MINI-hxxc-m4r8-3m67","MINI-j2g3-76pf-g578","MINI-jrcp-2fv4-9m4c","MINI-jv4m-6h6x-cmj5","MINI-jxrw-qf6f-4w4x","MINI-m4cj-54fj-mh5m","MINI-m5g8-g2xf-fjwj","MINI-m94v-rggg-gxhr","MINI-mcc8-rp26-3h84","MINI-mfx4-x52m-g4c5","MINI-mgwc-pmf5-pcrq","MINI-mgx7-qxh3-8xrj","MINI-mh45-7wq8-qc9c","MINI-mhcg-mgq5-qvrc","MINI-mmq6-xp5f-3ggf","MINI-mmr7-p36w-r5x8","MINI-mr7m-cvx6-c92r","MINI-mr8q-q497-m8wr","MINI-mrg6-fcxg-rrh5","MINI-pf89-86cq-7jxf","MINI-ph54-64pw-9qvc","MINI-pmqx-xfh9-hf9c","MINI-pq4h-w5f4-h2r4","MINI-px66-jp36-8645","MINI-q55h-fqv4-xc5m","MINI-q56p-r84x-qfxx","MINI-qjv8-wx46-g34m","MINI-qwh2-96x7-f4ch","MINI-qxjg-ccrp-2g9j","MINI-r33w-p48r-mgfj","MINI-r545-fc6c-qwgf","MINI-r64h-wrf7-mqg6","MINI-rrhr-2x2h-xr4f","MINI-v6qh-w629-22q4","MINI-v9hm-wjq4-5xf6","MINI-v9wm-x8jq-7r54","MINI-vh5r-q4wv-x2gx","MINI-vj43-wvr7-747p","MINI-vv75-rwwh-jrcq","MINI-whh7-gm9m-9pmx","MINI-wwvp-644f-663m","MINI-x9p3-fgxf-f3mc","MINI-xxjg-mr7h-c3gh","UBUNTU-CVE-2026-56746"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Netty network framework","requires_auth":"none","summary":"Attackers can bypass CORS short-circuit protections in Netty by sending a null Origin header, allowing unauthorized requests to reach backend applications.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"netty","vendor":"netty"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, are vulnerable to security control bypass during the origin evaluation process. CorsHandler provides a shortCircuit() configuration designed to reject unauthorized cross-origin requests immediately, acting as a security control before requests reach the application. However, due to a logical operator error in the origin evaluation process, this protection can be entirely bypassed. An attacker can bypass the short-circuit mechanism by sending a request with an Origin: null header. This failure forwards unauthorized requests to the backend application, bypassing intended access controls. 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 has a Security Control Bypass via CORS Short-Circuit Failure","id":"CVE-2026-56746","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"netty:netty","products":["netty:netty"],"type":"security_feature_bypass","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Code Injection in JSON Pointer Processing Component in Cribl Stream","id":"CVE-2026-56747"},"packages":[{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":null,"source":"GHSA-6cqp-g7gg-8hr5"},{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":"pkg:maven/io.netty/netty-codec-http","source":"GHSA-6cqp-g7gg-8hr5"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":null,"source":"GHSA-6cqp-g7gg-8hr5"},{"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-6cqp-g7gg-8hr5"}],"prev":{"headline":"Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion","id":"CVE-2026-56745"},"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 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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-22","vendors":["netty"]},"summary":"Attackers can bypass CORS short-circuit protections in Netty by sending a null Origin header, allowing unauthorized requests to reach backend applications.","url":"https://insights.sbomify.com/CVE-2026-56746/"}