GHSA-WPMP-4GRC-56PH
Vulnerability from github – Published: 2026-10-26 15:34 – Updated: 2026-10-26 15:34Allocation 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.
hackney_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.
This issue affects hackney: from 2.0.0-beta.1 before 4.9.0.
{
"affected": [],
"aliases": [
"CVE-2026-97200"
],
"database_specific": {
"cwe_ids": [
"CWE-409"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-26T14:16:42Z",
"severity": "HIGH"
},
"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.",
"id": "GHSA-wpmp-4grc-56ph",
"modified": "2026-10-26T15:34:45Z",
"published": "2026-10-26T15:34:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97200"
},
{
"type": "WEB",
"url": "https://github.com/benoitc/hackney/pull/980"
},
{
"type": "WEB",
"url": "https://github.com/benoitc/hackney/commit/493e8bf83a391548e5101792276ab3fc428fa76c"
},
{
"type": "WEB",
"url": "https://github.com/benoitc/hackney/commit/dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
},
{
"type": "WEB",
"url": "https://cna.erlef.org/cves/CVE-2026-97200.html"
},
{
"type": "WEB",
"url": "https://github.com/benoitc/hackney/releases/tag/4.9.0"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-97200"
}
],
"schema_version": "1.4.0",
"severity": [
{
"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
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