{"answers":{"affected":"4 open source packages ship an affected version, including io.netty:netty-codec-haproxy. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59919 exists.","fix":"Upgrade io.netty:netty-codec-haproxy to a fixed version for your release line: 4.1.136.Final or 4.2.16.Final.","what":"CVE-2026-59919 is a medium-severity vulnerability in Netty Netty, published on 29 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-59919 and fix it if it is affected.\n\nWhat it is: CVE-2026-59919 is a medium-severity vulnerability in Netty Netty, published on 29 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59919 exists.\n\nAffected packages and fixed versions:\n- io.netty:netty-codec-haproxy (Maven): affected all versions; fixed in 4.1.136.Final\n- io.netty:netty-codec-haproxy (Maven): affected all versions; fixed in 4.1.136.Final\n- io.netty:netty-codec-haproxy (Maven): affected from 4.2.0.Final; fixed in 4.2.16.Final\n- io.netty:netty-codec-haproxy (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-2026-59919/ (Markdown: https://insights.sbomify.com/CVE-2026-59919/index.md)","id":"CVE-2026-59919","markdown":"https://insights.sbomify.com/CVE-2026-59919/index.md","name":"CVE-2026-59919","record":{"aliases":["CLEANSTART-2026-DB56545","CLEANSTART-2026-NC41949","DEBIAN-CVE-2026-59919","ECHO-970b-879f-6b93","GHSA-wh89-7897-x99h","MINI-29rj-fwgw-2q93","MINI-2g42-82xp-r7m3","MINI-36qx-ffv7-9cpf","MINI-3qp5-9cc4-wh2f","MINI-4c7x-pvqm-j894","MINI-52g5-fjw3-v5q8","MINI-52rx-m5xx-jcxr","MINI-59rh-vv9m-29v8","MINI-5rpp-h6v3-v838","MINI-6g39-wh4j-42f7","MINI-6gjv-42qh-g5c4","MINI-7xw5-7f58-v9jm","MINI-8282-6h85-xrqx","MINI-9c7v-6pj8-7p66","MINI-9xg7-2h4c-q4q8","MINI-cqqf-xx4w-7449","MINI-fgcp-896m-w5x4","MINI-fx43-qwvx-xhqw","MINI-fx48-h7w4-8f43","MINI-fx8g-cm74-qcch","MINI-g2x4-jqvj-pm23","MINI-g7w5-hcf2-cwwx","MINI-gcx2-q9mj-pp6q","MINI-hf8r-9c38-739f","MINI-jcpv-mp23-vwqf","MINI-mqmq-wg57-cfx2","MINI-q7hc-x8v4-73gv","MINI-qr2f-xpv3-4gq2","MINI-qxmw-6gqr-9v5f","MINI-rf79-63c3-q24j","MINI-rxh7-9hr5-rv6r","MINI-rxvr-9f8g-rpwx","MINI-rxw4-2gjv-cprr","MINI-v5fj-ghw9-2cjf","MINI-vr47-wpf4-625x","MINI-vvmq-29qp-4g86","MINI-x6hf-cjhp-hxxg","MINI-xf74-m285-p95r","UBUNTU-CVE-2026-59919"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Netty network framework","requires_auth":"low_privilege","summary":"Attackers can inject CRLF sequences into HAProxy V1 headers via AF_UNIX addresses, spoofing client IPs to downstream servers.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"netty","vendor":"netty"}],"cvss":{"score":5.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-93","name":"Improper Neutralization of CRLF Sequences"}],"description":"Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.136.Final and 4.2.16.Final, Netty's HAProxy encoder ( HAProxyMessageEncoder ) writes AF_UNIX source and destination socket addresses into the HAProxy V1 text protocol without validating them for CRLF characters, so an attacker who controls an AF_UNIX address can inject  \\r\\n  sequences and split the single PROXY header into multiple lines. This is possible because the V1 protocol uses CRLF as its line terminator and, unlike IPv4/IPv6 addresses whose format checks implicitly reject CRLF, AF_UNIX addresses are only validated for length (up to 108 bytes), allowing a forged second PROXY header line that spoofs the client source/destination IP to a downstream server or load balancer. The 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: HAProxy V1 Protocol CRLF Injection via AF_UNIX Address","id":"CVE-2026-59919","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"netty:netty","products":["netty:netty"],"type":"other","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"Netty: STOMP CONNECT Frame Header Injection","id":"CVE-2026-59920"},"packages":[{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-haproxy","purl":null,"source":"GHSA-wh89-7897-x99h"},{"ecosystem":"Maven","fixed":["4.1.136.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-haproxy","purl":"pkg:maven/io.netty/netty-codec-haproxy","source":"GHSA-wh89-7897-x99h"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-haproxy","purl":null,"source":"GHSA-wh89-7897-x99h"},{"ecosystem":"Maven","fixed":["4.2.16.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-codec-haproxy","purl":"pkg:maven/io.netty/netty-codec-haproxy","source":"GHSA-wh89-7897-x99h"}],"prev":{"headline":"Privilege escalation in Display and Peripheral Manager (DDPM Windows)","id":"CVE-2026-59917"},"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-29","vendors":["netty"]},"summary":"Attackers can inject CRLF sequences into HAProxy V1 headers via AF_UNIX addresses, spoofing client IPs to downstream servers.","url":"https://insights.sbomify.com/CVE-2026-59919/"}