{"answers":{"affected":"4 open source packages ship an affected version, including io.netty:netty-handler. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-44249 in the wild and no public exploit code.","fix":"Upgrade io.netty:netty-handler to a fixed version for your release line: 4.1.135.Final or 4.2.15.Final.","what":"CVE-2026-44249 is a high-severity vulnerability in Netty Netty, published on 11 Jun 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-2026-44249 and fix it if it is affected.\n\nWhat it is: CVE-2026-44249 is a high-severity vulnerability in Netty Netty, published on 11 Jun 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-2026-44249 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.netty:netty-handler (Maven): affected all versions; fixed in 4.1.135.Final\n- io.netty:netty-handler (Maven): affected all versions; fixed in 4.1.135.Final\n- io.netty:netty-handler (Maven): affected from 4.2.0.Final; fixed in 4.2.15.Final\n- io.netty:netty-handler (Maven): affected from 4.2.0.Final; fixed in 4.2.15.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-2026-44249/ (Markdown: https://insights.sbomify.com/CVE-2026-44249/index.md)","id":"CVE-2026-44249","markdown":"https://insights.sbomify.com/CVE-2026-44249/index.md","name":"CVE-2026-44249","record":{"aliases":["CLEANSTART-2026-IH49300","CLEANSTART-2026-OD95693","CLEANSTART-2026-PH55510","CLEANSTART-2026-SX32964","CLEANSTART-2026-UH79636","DEBIAN-CVE-2026-44249","ECHO-d6fb-c7c2-3e8d","GHSA-3qp7-7mw8-wx86","MINI-22jv-52cm-qvx2","MINI-24g9-f86c-2fhv","MINI-27xm-32ch-hh9g","MINI-2gv6-5j79-638x","MINI-34xh-h3g5-fqf5","MINI-39hg-m656-cx9c","MINI-3cf4-vcvp-6hfm","MINI-3jj8-69jh-5qfx","MINI-3rxg-4pjp-q62w","MINI-3vqw-3p99-5wv4","MINI-46h7-2hqq-c5w7","MINI-49qv-2mgc-cmfm","MINI-4pjg-9v86-hwqh","MINI-4pwq-ph25-mmfm","MINI-4v7m-82ph-xvff","MINI-4wqw-q4vj-c2jh","MINI-4xxm-qmm9-cgp4","MINI-5674-8jh2-534m","MINI-58g8-fw7j-vcrq","MINI-5f6h-wv66-xv4x","MINI-5p6m-g94w-gqh3","MINI-5qcr-7h56-4hwv","MINI-5qwx-7x3f-6hph","MINI-64qg-qcpr-3f5r","MINI-65x7-3g34-c6p6","MINI-6fgq-cx72-mmvp","MINI-6g6c-7qm6-wjc5","MINI-6jcp-hx8p-p235","MINI-6v8x-7g9m-69h3","MINI-6vcm-wvj6-jf9x","MINI-72p5-994v-286q","MINI-739f-2cm5-mcw9","MINI-73gw-v542-gcq6","MINI-76hp-4m25-3v35","MINI-7c4j-whqx-88c9","MINI-7jcj-4rg2-3rhr","MINI-7pc6-2wq8-vjg4","MINI-7w7q-jvfm-34vq","MINI-87mr-f3v8-hg46","MINI-8934-q66m-h4hx","MINI-8rh5-r84j-rq5h","MINI-8wx8-qcw9-9m8r","MINI-8x6w-pv8m-gr86","MINI-98rj-wx7j-r44q","MINI-9ccv-368h-mqff","MINI-9gc6-9hh4-q5r4","MINI-9hjg-p83v-gw4r","MINI-9q99-grr4-w48g","MINI-9r4f-qvqq-8gvx","MINI-c8mp-79c3-724x","MINI-c9hq-v9g7-63p4","MINI-cg54-54r7-6rrr","MINI-cp95-3wqq-fqr8","MINI-cr9f-rf8f-5gjr","MINI-crmw-h424-vfpw","MINI-cxcf-g2h2-74xr","MINI-cxf6-qgvg-rgq4","MINI-f8xq-g3fx-gj9c","MINI-fc5c-hqw6-p7qw","MINI-fc8q-99cm-3c68","MINI-ff2q-fg7f-5x68","MINI-ff77-r98v-44fj","MINI-fg69-xm94-2wwq","MINI-fwh9-796c-r36w","MINI-g523-c377-5c5q","MINI-ggpx-x448-87m8","MINI-ggvc-7wgp-jp2h","MINI-gj26-xpw2-rfwf","MINI-gm43-pr47-mffc","MINI-gmx6-pq65-42x3","MINI-h94x-pwj2-2p9j","MINI-hcfq-9w29-4qmc","MINI-hrm7-8mrp-3x6g","MINI-hvf6-r937-3hqv","MINI-j339-h5pc-595q","MINI-j3g9-3gcj-p28h","MINI-j5q3-8phf-xv6c","MINI-j8w6-3fp3-jr35","MINI-jfm2-qqmr-2c32","MINI-jg53-6pqm-2vw8","MINI-m359-qrpx-9w53","MINI-m497-rmxp-84q5","MINI-m695-w849-w6qw","MINI-m7rv-j525-c93g","MINI-m9r4-vjp6-89rg","MINI-mffp-hgcx-fcgc","MINI-mpf3-39hh-37m7","MINI-mx86-x96c-48m3","MINI-p4mw-qgj5-q3ww","MINI-p56c-wjqm-6vmf","MINI-p5gq-6c2q-98xc","MINI-p5vc-587j-hvc4","MINI-p743-v5mf-g693","MINI-p8fq-6h2x-j2qr","MINI-p99g-hh5g-9mgr","MINI-pwch-g3hc-366r","MINI-pxmc-vjhr-7886","MINI-q25f-285j-8853","MINI-q8xr-qgfr-hg3v","MINI-qrq6-pm8c-vmxq","MINI-qwx5-g7cg-446v","MINI-qxx8-g65f-g8f7","MINI-r68j-jwxm-gcvc","MINI-r6vv-942r-7hxr","MINI-r8v4-9762-x3rm","MINI-rc72-c3mh-897r","MINI-rfmq-3w2x-gqx5","MINI-rhc4-jpqm-9c8g","MINI-rmc9-ww37-mrjx","MINI-rpxw-6x6q-4rhg","MINI-rv8c-vm29-c583","MINI-rvw2-qrrx-ccr3","MINI-vqph-77jh-rgwm","MINI-vr76-j7m2-2h37","MINI-w6x8-38w7-c6cp","MINI-wf28-79jx-v8x6","MINI-wgpm-64wm-r28c","MINI-wmfc-p22x-p3hv","MINI-wq6w-wj7h-36pq","MINI-wrq4-2g97-wpmq","MINI-wx9h-fmvg-4hrh","MINI-x6m7-2pv3-frcc","MINI-xh7x-gf9h-hwxc","MINI-xwm5-ppfr-8898","ROOT-APP-MAVEN-CVE-2026-44249","UBUNTU-CVE-2026-44249"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Netty network framework","requires_auth":"none","summary":"Attackers can bypass IPv6 subnet access restrictions in Netty due to incorrect masking logic, allowing unauthorized access from valid public IPs.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"netty","vendor":"netty"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-1287","name":"Improper Validation of Specified Type of Input"},{"id":"CWE-697","name":"Incorrect Comparison"},{"id":"CWE-284","name":"Improper Access Control"}],"description":"Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.","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 an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking","id":"CVE-2026-44249","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":"Netty: Memory Exhaustion in RedisArrayAggregator due to Deeply Nested Arrays","id":"CVE-2026-44250"},"packages":[{"ecosystem":"Maven","fixed":["4.1.135.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-handler","purl":null,"source":"GHSA-3qp7-7mw8-wx86"},{"ecosystem":"Maven","fixed":["4.1.135.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-handler","purl":"pkg:maven/io.netty/netty-handler","source":"GHSA-3qp7-7mw8-wx86"},{"ecosystem":"Maven","fixed":["4.2.15.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-handler","purl":null,"source":"GHSA-3qp7-7mw8-wx86"},{"ecosystem":"Maven","fixed":["4.2.15.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-handler","purl":"pkg:maven/io.netty/netty-handler","source":"GHSA-3qp7-7mw8-wx86"}],"prev":{"headline":"Netty: Resource exhaustion in MqttDecoder","id":"CVE-2026-44248"},"products":["netty"],"published":"2026-06-11","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":"total"},"state":"PUBLISHED","updated":"2026-09-18","vendors":["netty"]},"summary":"Attackers can bypass IPv6 subnet access restrictions in Netty due to incorrect masking logic, allowing unauthorized access from valid public IPs.","url":"https://insights.sbomify.com/CVE-2026-44249/"}