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        "cveId": "CVE-2026-47067",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-05-18T17:28:08.321Z",
        "datePublished": "2026-05-25T14:00:48.507Z",
        "dateUpdated": "2026-05-27T15:41:27.821Z"
    },
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                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
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                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "hackney_url"
                    ],
                    "packageName": "hackney",
                    "packageURL": "pkg:hex/hackney",
                    "product": "hackney",
                    "programFiles": [
                        "src/hackney_url.erl"
                    ],
                    "programRoutines": [
                        {
                            "name": "hackney_url:parse_url/1"
                        }
                    ],
                    "repo": "https://github.com/benoitc/hackney",
                    "vendor": "benoitc",
                    "versions": [
                        {
                            "lessThan": "4.0.1",
                            "status": "affected",
                            "version": "2.0.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "hackney_url"
                    ],
                    "packageName": "benoitc/hackney",
                    "packageURL": "pkg:github/benoitc/hackney",
                    "product": "hackney",
                    "programFiles": [
                        "src/hackney_url.erl"
                    ],
                    "programRoutines": [
                        {
                            "name": "hackney_url:parse_url/1"
                        }
                    ],
                    "repo": "https://github.com/benoitc/hackney",
                    "vendor": "benoitc",
                    "versions": [
                        {
                            "lessThan": "31f6f0e27e096ad88743dfded4f030a3ee74972e",
                            "status": "affected",
                            "version": "d9713695c0d99855d12c73fd8a0b4be0543950c4",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "4.0.1",
                                    "versionStartIncluding": "2.0.0",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "AND"
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                    ],
                    "operator": "AND"
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            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Benoit Chesneau"
                },
                {
                    "lang": "en",
                    "type": "analyst",
                    "value": "Jonatan Männchen / EEF"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding.<p>The URL parser in <tt>src/hackney_url.erl</tt> converts every unrecognized URL scheme to a permanent BEAM atom via <tt>binary_to_atom/2</tt>. BEAM atoms are never garbage-collected and the atom table defaults to a hard limit of 1,048,576 entries. An attacker who can supply URLs with attacker-chosen scheme prefixes — directly as request targets, as configured webhook URLs, or via <tt>Location</tt> headers followed during redirects — can exhaust the atom table and crash the entire BEAM VM with <tt>system_limit</tt>.</p><p>This issue affects hackney: from 2.0.0 before 4.0.1.</p>"
                        }
                    ],
                    "value": "Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. The URL parser in src/hackney_url.erl converts every unrecognized URL scheme to a permanent BEAM atom via binary_to_atom/2. BEAM atoms are never garbage-collected and the atom table defaults to a hard limit of 1,048,576 entries. An attacker who can supply URLs with attacker-chosen scheme prefixes — directly as request targets, as configured webhook URLs, or via Location headers followed during redirects — can exhaust the atom table and crash the entire BEAM VM with system_limit.\n\nThis issue affects hackney: from 2.0.0 before 4.0.1."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-125",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-125 Flooding"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "privilegesRequired": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0",
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                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE"
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                    "format": "CVSS",
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                            "lang": "en",
                            "value": "GENERAL"
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            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-770",
                            "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                            "lang": "en",
                            "type": "CWE"
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            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-05-27T15:41:27.821Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-47067.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-47067"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/benoitc/hackney/commit/31f6f0e27e096ad88743dfded4f030a3ee74972e"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "Atom table exhaustion via unrecognized URL schemes in hackney",
            "x_generator": {
                "engine": "cvelib 1.8.0"
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        "adp": [
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                "references": [
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                "metrics": [
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                            "content": {
                                "timestamp": "2026-05-26T15:45:32.232194Z",
                                "id": "CVE-2026-47067",
                                "options": [
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                                        "Exploitation": "poc"
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                                        "Automatable": "yes"
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                                        "Technical Impact": "partial"
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                                "role": "CISA Coordinator",
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                "title": "CISA ADP Vulnrichment",
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