{"answers":{"affected":"3 open source packages ship an affected version, including hackney. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47071 exists.","fix":"Upgrade hackney to 4.0.1 or later.","what":"CVE-2026-47071 is a high-severity denial of service vulnerability in benoitc hackney, published on 25 May 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-2026-47071 and fix it if it is affected.\n\nWhat it is: CVE-2026-47071 is a high-severity denial of service vulnerability in benoitc hackney, published on 25 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47071 exists.\n\nAffected packages and fixed versions:\n- hackney (Hex): affected from 0.10.0; fixed in 4.0.1\n- hackney (Hex): affected from 0.10.0; fixed in 4.0.1\n- hackney (Hex): affected from 0.10.0; fixed in 4.0.1\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-2026-47071/ (Markdown: https://insights.sbomify.com/CVE-2026-47071/index.md)","id":"CVE-2026-47071","markdown":"https://insights.sbomify.com/CVE-2026-47071/index.md","name":"CVE-2026-47071","record":{"aliases":["EEF-CVE-2026-47071","GHSA-gp9c-pm5m-5cxr"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Erlang HTTP client","requires_auth":"none","summary":"A hostile SOCKS5 proxy can cause indefinite blocking in hackney by stalling the TLS handshake, ignoring caller-supplied timeouts.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[{"product":"hackney","vendor":"benoitc"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/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":"Uncontrolled Resource Consumption vulnerability in benoitc hackney allows Flooding. The SOCKS5 transport in src/hackney_socks5.erl correctly applies the caller-supplied timeout to the SOCKS5 negotiation phase, but then upgrades the connection to TLS using the two-argument form ssl:connect/2, which defaults to an infinite timeout. The Timeout value is in scope at the call site but is not forwarded. A hostile SOCKS5 proxy that completes the SOCKS5 handshake normally and then goes silent (or sends a partial TLS ServerHello and stalls) will cause the connecting process to block indefinitely, regardless of the connect_timeout or recv_timeout options supplied by the caller.\n\nThis issue affects hackney: from 0.10.0 before 4.0.1.","ecosystems":["Hex"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"SOCKS5 TLS upgrade ignores caller timeout in hackney","id":"CVE-2026-47071","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"CRLF injection in WebSocket upgrade request in hackney","id":"CVE-2026-47072"},"packages":[{"ecosystem":"Hex","fixed":["4.0.1"],"introduced":["0.10.0"],"last_affected":[],"package":"hackney","purl":"pkg:hex/hackney","source":"EEF-CVE-2026-47071"},{"ecosystem":"Hex","fixed":["4.0.1"],"introduced":["0.10.0"],"last_affected":[],"package":"hackney","purl":null,"source":"GHSA-gp9c-pm5m-5cxr"},{"ecosystem":"Hex","fixed":["4.0.1"],"introduced":["0.10.0"],"last_affected":[],"package":"hackney","purl":"pkg:hex/hackney","source":"GHSA-gp9c-pm5m-5cxr"}],"prev":{"headline":"HTTP/3 redirect handler leaks Authorization and Cookie headers to cross-origin redirect target in hackney","id":"CVE-2026-47070"},"products":["hackney"],"published":"2026-05-25","related":[{"cvss_score":8.7,"headline":"Infinite loop in Alt-Svc header parser in hackney","id":"CVE-2026-47066","kev_date_added":null,"published":"2026-05-25"},{"cvss_score":8.7,"headline":"Atom table exhaustion via unrecognized URL schemes in hackney","id":"CVE-2026-47067","kev_date_added":null,"published":"2026-05-25"},{"cvss_score":8.7,"headline":"Unbounded memory consumption in WebSocket client in hackney","id":"CVE-2026-47073","kev_date_added":null,"published":"2026-05-25"},{"cvss_score":8.2,"headline":"Unbounded body accumulation in HTTP/3 response loop in hackney","id":"CVE-2026-47077","kev_date_added":null,"published":"2026-05-25"},{"cvss_score":6.9,"headline":"CRLF injection in WebSocket upgrade request in hackney","id":"CVE-2026-47072","kev_date_added":null,"published":"2026-05-25"},{"cvss_score":6.9,"headline":"SSRF allowlist bypass via percent-encoded host in hackney","id":"CVE-2026-47076","kev_date_added":null,"published":"2026-05-25"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-27","vendors":["benoitc"]},"summary":"A hostile SOCKS5 proxy can cause indefinite blocking in hackney by stalling the TLS handshake, ignoring caller-supplied timeouts.","url":"https://insights.sbomify.com/CVE-2026-47071/"}