{"id":"CVE-2026-82728","summary":"Unbounded HTTP/1 status-line and chunk-extension buffering in Mint causes memory-exhaustion DoS","details":"Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint mint allows a remote HTTP server to exhaust memory on the client host and cause a denial of service.\n\nTwo HTTP/1 response-parser states accumulate server data without any cap. In lib/mint/http1.ex, decode_status_line/4 stores the unconsumed data in conn.buffer when the status line is incomplete, and decode_body/5 does the same for an unterminated chunk-extension line. Both wait for a CRLF the server never has to send, and conn.buffer is prepended to every subsequent socket message. The :max_header_list_size budget is wired only into decode_headers/5 and decode_trailer_headers/4, so neither of these states is covered by it. A malicious server, or one reached through an attacker-controlled redirect or a fetched URL, streams bytes indefinitely until the BEAM node is killed by the operating system out-of-memory handler. The chunk-extension variant is reached after a valid status line and a complete, valid header section, so an intermediary inspecting only headers sees an ordinary 200 response.\n\nThis issue affects mint: from 0.1.0 before 1.10.0.","aliases":["EEF-CVE-2026-82728","GHSA-g83f-2j6r-q6m4"],"modified":"2026-09-10T03:30:41.252178152Z","published":"2026-09-04T14:31:30.059Z","database_specific":{"cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82728.json","unresolved_ranges":[{"extracted_events":[{"introduced":"c088e4b6430545338841ab8d294369e45d39856a"},{"fixed":"19be5558b6a317e271c78666498dd78b151e490a"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"EEF"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-82728.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-82728"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82728.json"},{"type":"ADVISORY","url":"https://github.com/elixir-mint/mint/security/advisories/GHSA-g83f-2j6r-q6m4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82728"},{"type":"FIX","url":"https://github.com/elixir-mint/mint/commit/19be5558b6a317e271c78666498dd78b151e490a"},{"type":"PACKAGE","url":"https://github.com/elixir-mint/mint"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elixir-mint/mint","events":[{"introduced":"47889857fb36f07606ad9c2e52080d202d419058"},{"fixed":"75c8be1fada9983d6972418d162d55b6e62d507e"},{"fixed":"19be5558b6a317e271c78666498dd78b151e490a"}],"database_specific":{"extracted_events":[{"introduced":"0.1.0"},{"fixed":"1.10.0"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v1.9.3","v1.9.2","v1.9.1","v1.9.0","v1.8.0","v1.7.1","v1.7.0","v1.6.2","v1.6.1","v1.6.0","v1.5.2","v1.5.1","v1.5.0","v1.4.2","v1.4.1","v1.4.0","v1.3.0","v1.2.1","v1.2.0","v1.1.0","v1.0.0","v0.5.0","v0.4.0","v0.2.1","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82728.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}