CVE-2026-97200
Severity not reportedAllocation of Resources Without Limits or Throttling vulnerability in hackney_conn in benoitc hackney allows a malicious HTTP server to exhaust client memory v…
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. 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 products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://cna.erlef.org/cves/CVE-2026-97200.html 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- https://github.com/benoitc/hackney/commit/493e8bf83a391548e5101792276ab3fc428fa76c 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- https://github.com/benoitc/hackney/commit/dc41b79339ca0c41e16d3f2dd17172bc2de855d6 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- https://github.com/benoitc/hackney/pull/980 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- https://github.com/benoitc/hackney/releases/tag/4.9.0 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- https://osv.dev/vulnerability/EEF-CVE-2026-97200 6b3ad84c-e1a6-4bf7-a703-f496b71e49db