CVE-2026-97200

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Source
https://cve.org/CVERecord?id=CVE-2026-97200
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97200.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-97200
Aliases
Published
2026-10-26T13:49:40Z
Modified
2026-10-29T02:48:34Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
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.

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.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-409",
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97200.json"
}
References

Affected packages

Git / github.com/benoitc/hackney

Affected ranges

Type
GIT
Repo
https://github.com/benoitc/hackney
Events
Introduced
dc41b79339ca0c41e16d3f2dd17172bc2de855d6
Fixed
493e8bf83a391548e5101792276ab3fc428fa76c
Introduced
e0f288721bb99f4f423172f7321875fcbc96ff86
Fixed
0f5db333d43600e7b9fb9346143b4e9fdb8924ea
Fixed
dc41b79339ca0c41e16d3f2dd17172bc2de855d6
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
                },
                {
                    "fixed": "493e8bf83a391548e5101792276ab3fc428fa76c"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "2.0.0-beta.1"
                },
                {
                    "fixed": "4.9.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "original_tag": "4.9.0",
            "range": [
                {
                    "fixed": "0f5db333d43600e7b9fb9346143b4e9fdb8924ea"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "range": [
                {
                    "fixed": "dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "493e8bf83a391548e5101792276ab3fc428fa76c"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

2.*
2.0.0
2.0.0-beta.1
2.0.1
3.*
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.*
4.0.0
4.0.1
4.0.2
4.0.3
4.1.0
4.2.0
4.2.1
4.2.2
4.2.3
4.3.0
4.4.0
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.5.0
4.5.1
4.5.2
4.6.0
4.6.1
4.7.0
4.7.1
4.7.2
4.7.3
4.7.4
4.8.0
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
4.8.6
4.8.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97200.json"