{"affected":[{"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-76v6-f83q-pxvh/GHSA-76v6-f83q-pxvh.json"},"package":{"ecosystem":"Hex","name":"hackney","purl":"pkg:hex/hackney"},"ranges":[{"events":[{"introduced":"2.0.0"},{"fixed":"4.0.1"}],"type":"SEMVER"}],"versions":["2.0.0","2.0.1","3.0.0","3.0.1","3.0.2","3.0.3","3.1.0","3.1.1","3.1.2","3.2.0","3.2.1","4.0.0"]}],"database_specific":{"cwe_ids":["CWE-400"],"github_reviewed":true,"github_reviewed_at":"2026-06-30T17:00:40Z","nvd_published_at":"2026-05-25T15:16:22Z","severity":"HIGH"},"details":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-jq4m-q6p2-8gwc. This link is maintained to preserve external references.\n\n## Original Description\nAllocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. hackney_h3:await_response_loop/6 accumulates the HTTP/3 response body in memory without any size cap. The after Timeout clause is a per-message inactivity timer that resets on every received chunk, housekeeping message, or settings frame — it is not a wall-clock deadline. A malicious HTTP/3 server that emits one small chunk every Timeout - 1 ms with Fin = false and never sends a final frame keeps the loop alive indefinitely while the accumulation buffer grows linearly without bound, eventually exhausting the BEAM process heap and causing an out-of-memory condition.\n\nThis issue affects hackney: from 2.0.0 before 4.0.1.","id":"GHSA-76v6-f83q-pxvh","modified":"2026-09-10T03:50:46.082386095Z","published":"2026-05-26T13:30:46Z","references":[{"type":"WEB","url":"https://github.com/benoitc/hackney/security/advisories/GHSA-jq4m-q6p2-8gwc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47077"},{"type":"WEB","url":"https://github.com/benoitc/hackney/commit/3d25f9fea26c90609de9d64366fedfe5065413bc"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-47077.html"},{"type":"PACKAGE","url":"https://github.com/benoitc/hackney"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-47077"}],"schema_version":"1.9.0","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"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","type":"CVSS_V4"}],"summary":"Duplicate Advisory: Hackney has an Allocation of Resources Without Limits or Throttling vulnerabilit","withdrawn":"2026-06-30T17:15:56Z"}