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vuln-cve/data/2026/70xxx/CVE-2026-70409.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-70409",
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"state": "PUBLISHED",
"assignerShortName": "EEF",
"dateReserved": "2026-08-09T16:30:01.576Z",
"datePublished": "2026-09-01T14:51:00.770Z",
"dateUpdated": "2026-11-11T13:48:47.878Z"
},
"containers": {
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"eldap"
],
"packageName": "otp",
"packageURL": "pkg:software-id/erlang.org/otp",
"product": "OTP",
"programFiles": [
"lib/eldap/src/eldap.erl"
],
"programRoutines": [
{
"name": "eldap:parse_port/2"
},
{
"name": "eldap:parse_hostport/1"
},
{
"name": "eldap:parse_ldap_url/1"
}
],
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "27.3.4.17",
"status": "unaffected"
},
{
"at": "28.5.0.6",
"status": "unaffected"
},
{
"at": "29.0.6",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "17.0",
"versionType": "otp"
}
]
},
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"eldap"
],
"packageName": "eldap",
"packageURL": "pkg:otp/eldap?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
"product": "OTP",
"programFiles": [
"src/eldap.erl"
],
"programRoutines": [
{
"name": "eldap:parse_port/2"
},
{
"name": "eldap:parse_hostport/1"
},
{
"name": "eldap:parse_ldap_url/1"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "1.2.14.2",
"status": "unaffected"
},
{
"at": "1.2.16.1",
"status": "unaffected"
},
{
"at": "1.3.1",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "1.0.3",
"versionType": "otp"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"eldap"
],
"packageName": "erlang/otp",
"packageURL": "pkg:github/erlang/otp",
"product": "OTP",
"programFiles": [
"lib/eldap/src/eldap.erl"
],
"programRoutines": [
{
"name": "eldap:parse_port/2"
},
{
"name": "eldap:parse_hostport/1"
},
{
"name": "eldap:parse_ldap_url/1"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "aba0fe8c2d700bf4ac94607cf7f00e53bbe4042d",
"status": "unaffected"
},
{
"at": "e3be1cfe9f6cedd0cd20d9905e05601dfb31c8aa",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "d8dbf15de4fa1a08b9a05e7d8e08fdb025fe1dc3",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "27.3.4.17",
"versionStartIncluding": "17.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "28.5.0.6",
"versionStartIncluding": "28.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "29.0.6",
"versionStartIncluding": "29.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Eric Meadows-Jönsson"
},
{
"lang": "en",
"type": "finder",
"value": "Jonatan Männchen / EEF"
},
{
"lang": "en",
"type": "finder",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "finder",
"value": "José Valim"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Konrad Pietrzak / Ericsson"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "<p>Improper Validation of Specified Quantity in Input vulnerability in Erlang/OTP eldap allows a malicious or compromised LDAP server to degrade availability by returning a referral URL whose port component is a very long run of digits.</p>\n<p><code>eldap:parse_port/2</code> passes the port substring straight to <code>list_to_integer/1</code> with no length bound. The surrounding <code>try ... catch</code> only rejects a value that fails to parse, so a syntactically valid port of up to roughly 1.26 million digits converts successfully and costs the caller hundreds of milliseconds of arbitrary-precision arithmetic per referral. The conversion function itself is documented to accept integers of any size, so bounding the input is the caller's responsibility. Reaching the flaw requires the application to pass a server-supplied referral to <code>eldap:parse_ldap_url/1</code>, which eldap never calls itself: referral strings are returned to the caller unparsed.</p>\n<p>This issue affects OTP from OTP&nbsp;17.0 before OTP&nbsp;27.3.4.17, OTP&nbsp;28.5.0.6, and OTP&nbsp;29.0.6, corresponding to eldap from 1.0.3 before 1.2.14.2, 1.2.16.1, and 1.3.1.</p>"
},
{
"base64": false,
"type": "text/markdown",
"value": "Improper Validation of Specified Quantity in Input vulnerability in Erlang/OTP eldap allows a malicious or compromised LDAP server to degrade availability by returning a referral URL whose port component is a very long run of digits.\n\n`eldap:parse_port/2` passes the port substring straight to `list_to_integer/1` with no length bound. The surrounding `try ... catch` only rejects a value that fails to parse, so a syntactically valid port of up to roughly 1.26 million digits converts successfully and costs the caller hundreds of milliseconds of arbitrary-precision arithmetic per referral. The conversion function itself is documented to accept integers of any size, so bounding the input is the caller's responsibility. Reaching the flaw requires the application to pass a server-supplied referral to `eldap:parse_ldap_url/1`, which eldap never calls itself: referral strings are returned to the caller unparsed.\n\nThis issue affects OTP from OTP 17.0 before OTP 27.3.4.17, OTP 28.5.0.6, and OTP 29.0.6, corresponding to eldap from 1.0.3 before 1.2.14.2, 1.2.16.1, and 1.3.1."
}
],
"value": "Improper Validation of Specified Quantity in Input vulnerability in Erlang/OTP eldap allows a malicious or compromised LDAP server to degrade availability by returning a referral URL whose port component is a very long run of digits.\n\neldap:parse_port/2 passes the port substring straight to list_to_integer/1 with no length bound. The surrounding try ... catch only rejects a value that fails to parse, so a syntactically valid port of up to roughly 1.26 million digits converts successfully and costs the caller hundreds of milliseconds of arbitrary-precision arithmetic per referral. The conversion function itself is documented to accept integers of any size, so bounding the input is the caller's responsibility. Reaching the flaw requires the application to pass a server-supplied referral to eldap:parse_ldap_url/1, which eldap never calls itself: referral strings are returned to the caller unparsed.\n\nThis issue affects OTP from OTP 17.0 before OTP 27.3.4.17, OTP 28.5.0.6, and OTP 29.0.6, corresponding to eldap from 1.0.3 before 1.2.14.2, 1.2.16.1, and 1.3.1."
}
],
"impacts": [
{
"capecId": "CAPEC-231",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-231 Oversized Serialized Data Payloads"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1284",
"description": "CWE-1284 Improper Validation of Specified Quantity in Input",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF",
"dateUpdated": "2026-11-11T13:48:47.878Z"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/erlang/otp/security/advisories/GHSA-9vgh-c8cm-m9p4"
},
{
"name": "EEF CNA record for CVE-2026-70409",
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-70409.html"
},
{
"name": "OSV record EEF-CVE-2026-70409",
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-70409"
},
{
"name": "Erlang/OTP version ordering",
"tags": [
"x_version-scheme"
],
"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
},
{
"name": "Introducing commit d8dbf15 in erlang/otp",
"tags": [
"related"
],
"url": "https://github.com/erlang/otp/commit/d8dbf15de4fa1a08b9a05e7d8e08fdb025fe1dc3"
},
{
"name": "Fix commit aba0fe8 in erlang/otp",
"tags": [
"patch"
],
"url": "https://github.com/erlang/otp/commit/aba0fe8c2d700bf4ac94607cf7f00e53bbe4042d"
},
{
"name": "Fix commit e3be1cf in erlang/otp",
"tags": [
"patch"
],
"url": "https://github.com/erlang/otp/commit/e3be1cfe9f6cedd0cd20d9905e05601dfb31c8aa"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "eldap does not bound the port component of a referral URL before integer conversion"
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-01T17:52:58.419812Z",
"id": "CVE-2026-70409",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-01T17:54:18.825Z"
}
}
]
}
}
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