{"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-2026-59899 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-2026-59899 is a medium-severity vulnerability in Netty Netty, published on 29 Jul 2026."},"fix_prompt":"Check this codebase for CVE-2026-59899 and fix it if it is affected.\n\nWhat it is: CVE-2026-59899 is a medium-severity vulnerability in Netty Netty, published on 29 Jul 2026. \nExploitation: There is no known exploitation of CVE-2026-59899 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-2026-59899/ (Markdown: https://insights.sbomify.com/CVE-2026-59899/index.md)","id":"CVE-2026-59899","markdown":"https://insights.sbomify.com/CVE-2026-59899/index.md","name":"CVE-2026-59899","record":{"aliases":["CLEANSTART-2026-BX32842","CLEANSTART-2026-DM42176","CLEANSTART-2026-EA53751","CLEANSTART-2026-LJ83599","CLEANSTART-2026-UQ38105","DEBIAN-CVE-2026-59899","ECHO-4b1e-5b94-dbf6","GHSA-q4f6-jm68-57ww","MINI-2f7q-c82g-94r6","MINI-2h5c-hcgx-j64p","MINI-3467-qqhw-4rg9","MINI-3582-p258-36mh","MINI-372c-ff3g-fmf8","MINI-38vv-2jfj-hqcx","MINI-39gm-pvpm-gfc2","MINI-3c63-9ww5-p54c","MINI-3fqq-6jf5-4xw4","MINI-3w93-252p-qcq8","MINI-3x9m-m57m-j3ph","MINI-454w-2qcc-hf99","MINI-4fmw-wvp6-f33p","MINI-4pgj-86hx-3mx9","MINI-4qgh-xwrm-m8g9","MINI-4rr3-8qvg-75rm","MINI-522c-fw5g-m5x5","MINI-52xr-h6rp-978v","MINI-55fq-9v2w-8vvp","MINI-57pp-fgj2-cm3c","MINI-5p8f-rgv3-h6jp","MINI-5pqw-jvqf-6rv6","MINI-5xxw-prw9-54j7","MINI-6489-g2jc-f7vq","MINI-65rh-qpx3-86j8","MINI-65vg-wq4p-pvw2","MINI-68pf-w5fr-2xrq","MINI-6h4j-q96h-6vx5","MINI-6h5j-43vv-xqc7","MINI-6h69-jq8c-6r7p","MINI-6rp8-qh28-fmhg","MINI-6rrv-v67p-2w2j","MINI-73xh-55gv-rcgf","MINI-75jp-m8qq-g7r7","MINI-75qp-97r3-pmv9","MINI-79v8-8m6q-pfx4","MINI-7g48-9rq3-v3pv","MINI-7pfm-vcrw-fprh","MINI-7rcq-2x24-5gv6","MINI-7v9f-m3gw-83rh","MINI-7vcw-gr7r-c5mm","MINI-825f-jg4f-fgj9","MINI-8gfc-fwhg-6r7p","MINI-8m86-4c75-7277","MINI-92xr-x9v4-ccmx","MINI-93pf-57hw-v8h7","MINI-94jf-pg7g-v6jw","MINI-98qw-276j-2fw9","MINI-c5w7-65qx-mp4r","MINI-cc37-v6fg-rwx9","MINI-cc8v-jqq9-3vhh","MINI-cmpp-qh63-rh3h","MINI-crhj-mh75-c44c","MINI-cv56-xrrc-m39x","MINI-f9xm-7jcq-fc5m","MINI-fpf5-cfjv-2jqm","MINI-fpr8-qcvg-62g8","MINI-g347-fwhg-h22h","MINI-g3q6-m9hw-7cxr","MINI-gfrm-3qxh-rj4f","MINI-h26c-hh6q-vrhf","MINI-h4jh-mhp6-335p","MINI-hv34-j2mq-m77w","MINI-j6rx-r7wh-47rx","MINI-jr98-vw93-fvr2","MINI-mqjr-f44f-f5xx","MINI-p4q2-jvq8-6xv5","MINI-p7v5-7mh3-g386","MINI-p832-85xw-mh2x","MINI-pg3q-qmfx-rxj7","MINI-pj2g-rpf2-xwf2","MINI-pmgf-92g4-x2pv","MINI-pw8h-gwqw-ff9q","MINI-pxwp-g88r-vp9p","MINI-q2cp-qxvv-5g66","MINI-q5r8-h2g7-vj2x","MINI-qq39-325f-jgv2","MINI-qwvj-25hv-93qq","MINI-qxpp-vpj4-ccx3","MINI-r693-chwg-gh2m","MINI-r6h4-979w-3prg","MINI-r862-x2fm-9c2r","MINI-rgp2-3prm-g2m2","MINI-rr3r-447m-4j54","MINI-rr64-q9v2-85fg","MINI-rx44-c9h9-3c29","MINI-v5f8-4g3v-2m4v","MINI-v7g8-7mcg-v352","MINI-v86v-m95q-vhwj","MINI-vh9f-8386-jjx5","MINI-vwq3-5hf4-rgr2","MINI-w4x2-2g8f-fw24","MINI-w645-jqrm-rfm7","MINI-w8v8-7c34-3rp7","MINI-w92g-v8m9-5qgm","MINI-wh62-9vff-8qxq","MINI-wpxf-p4q4-j7vh","MINI-wqh7-q7x6-q22g","MINI-x536-mm72-cp5r","MINI-x927-xx2r-mfw8","MINI-xcr3-7cgr-5qcx","MINI-xf99-grf7-vgjj","MINI-xmgc-2h55-f5hv","MINI-xwg6-w3gh-r7xx","MINI-xxc6-2qxw-jx5f","UBUNTU-CVE-2026-59899"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[{"product":"netty","vendor":"netty"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, `HttpContentEncoder` (the superclass of the production handler `HttpContentCompressor`) maintains a per-channel `ArrayDeque\u003cCharSequence\u003e` named `acceptEncodingQueue` that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses. This issue has been 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 HttpContentEncoder: Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service","id":"CVE-2026-59899","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"netty:netty","products":["netty:netty"],"type":null,"year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Netty codec-http2: Lack of Host Header Deduplication in HTTP/2→HTTP/1.x Translation Leads to Request Routing Bypass","id":"CVE-2026-59900"},"packages":[{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":null,"source":"GHSA-q4f6-jm68-57ww"},{"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-q4f6-jm68-57ww"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":null,"source":"GHSA-q4f6-jm68-57ww"},{"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-q4f6-jm68-57ww"}],"prev":{"headline":"Netty: WebSockets V07/V08 handshaker missing Connection/Upgrade validation","id":"CVE-2026-59898"},"products":["netty"],"published":"2026-07-29","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-30","vendors":["netty"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-59899/"}