{"schema":"threatline.record/2","record":{"id":"CVE-2026-97200","aliases":[],"summary":"Unbounded response body buffering and decompression in hackney","details":"Allocation of Resources Without Limits or Throttling vulnerability in hackney_conn in benoitc hackney allows a malicious HTTP server to exhaust client memory via an oversized or highly compressed response body. hackney:request/5 and hackney:body/1 return the whole response body, and nothing bounds how much the connection process buffers. Any server the client requests can trigger it.\n\nhackney_conn:read_full_body/2 and the HTTP/2 and HTTP/3 accumulators append every chunk until the body ends. With {auto_decompress, true} the buffered body is then inflated in one step with zlib:gunzip/1 or zlib:inflate/2, which return the whole output at once.\n\nThis issue affects hackney: from 2.0.0-beta.1 before 4.9.0.","categories":["Unclassified"],"product":"hackney","vendor":"benoitc","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97200","source_modified_at":"2026-10-26T15:35:50.487Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"hackney","vendor":"benoitc","versions":[{"lessThan":"4.9.0","status":"affected","version":"2.0.0-beta.1","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97200","source_modified_at":"2026-10-26T15:35:50.487Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"hackney","vendor":"benoitc","versions":[{"lessThan":"493e8bf83a391548e5101792276ab3fc428fa76c","status":"affected","version":"dc41b79339ca0c41e16d3f2dd17172bc2de855d6","versionType":"git"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97200","source_modified_at":"2026-10-26T15:35:50.487Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"hackney","ecosystem":null},"version":"4.9.0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97200","source_modified_at":"2026-10-26T15:35:50.487Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"hackney","ecosystem":null},"version":"493e8bf83a391548e5101792276ab3fc428fa76c","basis":"first unaffected version stated in the CVE record"}],"cvss":8.2,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T13:49:40.392Z","modified_at":"2026-10-26T15:35:50.487Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-97200","fetched_at":"2026-10-26T19:10:57.178988Z","source_modified_at":"2026-10-26T15:35:50.487Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/benoitc/hackney/releases/tag/4.9.0","tags":["vendor-advisory","related"]},{"source":"CVE List","url":"https://cna.erlef.org/cves/CVE-2026-97200.html","tags":["related"]},{"source":"CVE List","url":"https://osv.dev/vulnerability/EEF-CVE-2026-97200","tags":["related"]},{"source":"CVE List","url":"https://github.com/benoitc/hackney/pull/980","tags":["related"]},{"source":"CVE List","url":"https://github.com/benoitc/hackney/commit/dc41b79339ca0c41e16d3f2dd17172bc2de855d6","tags":["related"]},{"source":"CVE List","url":"https://github.com/benoitc/hackney/commit/493e8bf83a391548e5101792276ab3fc428fa76c","tags":["patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-26T14:54:57.385457Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-26T15:35:50.487Z","content_hash":"be94cc17314dea461b83aed1aae07651a614c25a88a344c7c9b083e342d30845"}}