FKIE_CVE-2026-115274
Vulnerability from fkie_nvd - Published: 2026-10-30 09:17 - Updated: 2026-10-30 19:39
Severity
Summary
Improper Validation of Specified Quantity in Input vulnerability in the Elixir standard library's JSON module allows an unauthenticated attacker who supplies a JSON document to cause a denial of service through CPU and memory exhaustion.
JSON.decode/1 and JSON.decode!/1 convert each integer literal with erlang:binary_to_integer/1 and do not bound its length. A literal of one million digits decodes successfully but costs 100 to 300 times as much CPU as a string of the same length, so one request body of a few megabytes holds a scheduler for about a second. A literal of more than about 1.29 million digits raises SystemLimitError. Applications generated by phx.new decode request bodies with JSON in Plug.Parsers, before routing and authentication.
This issue affects elixir: from 1.18.0-rc.0 before 1.18.6, from 1.19.0-rc.0 before 1.19.7, and from 1.20.0-rc.0 before 1.20.5.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"cpes": [
"cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.JSON\u0027",
"elixir_json"
],
"packageName": "elixir",
"packageURL": "pkg:otp/elixir?repository_url=https:%2F%2Fgithub.com%2Felixir-lang%2Felixir\u0026vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Felixir-lang%2Felixir.git",
"product": "elixir",
"programFiles": [
"lib/json.ex",
"src/elixir_json.erl"
],
"programRoutines": [
{
"name": "\u0027Elixir.JSON\u0027:decode/1"
},
{
"name": "\u0027Elixir.JSON\u0027:\u0027decode!\u0027/1"
},
{
"name": "\u0027Elixir.JSON\u0027:decode/3"
},
{
"name": "elixir_json:decode/3"
}
],
"repo": "https://github.com/elixir-lang/elixir",
"vendor": "elixir-lang",
"versions": [
{
"lessThan": "1.18.6",
"status": "affected",
"version": "1.18.0-rc.0",
"versionType": "semver"
},
{
"lessThan": "1.19.7",
"status": "affected",
"version": "1.19.0-rc.0",
"versionType": "semver"
},
{
"lessThan": "1.20.5",
"status": "affected",
"version": "1.20.0-rc.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.JSON\u0027",
"elixir_json"
],
"packageName": "elixir-lang/elixir",
"packageURL": "pkg:github/elixir-lang/elixir",
"product": "elixir",
"programFiles": [
"lib/elixir/lib/json.ex",
"lib/elixir/src/elixir_json.erl"
],
"programRoutines": [
{
"name": "\u0027Elixir.JSON\u0027:decode/1"
},
{
"name": "\u0027Elixir.JSON\u0027:\u0027decode!\u0027/1"
},
{
"name": "\u0027Elixir.JSON\u0027:decode/3"
},
{
"name": "elixir_json:decode/3"
}
],
"repo": "https://github.com/elixir-lang/elixir",
"vendor": "elixir-lang",
"versions": [
{
"changes": [
{
"at": "c81f12265919c34a0d5134f1905a4eb4edaea1c2",
"status": "unaffected"
},
{
"at": "7154e8781da9fd016a973ea01776a011c8b5726a",
"status": "unaffected"
},
{
"at": "cd158efacdc10b30232864251747dff9b8387dfe",
"status": "unaffected"
},
{
"at": "ee5cc23f8928aa5a0f25bb7f28e42ecfc7b7d396",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "793c1147210388587defb649f25f293ffbfa6b1b",
"versionType": "git"
}
]
}
],
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Improper Validation of Specified Quantity in Input vulnerability in the Elixir standard library\u0027s JSON module allows an unauthenticated attacker who supplies a JSON document to cause a denial of service through CPU and memory exhaustion.\n\nJSON.decode/1 and JSON.decode!/1 convert each integer literal with erlang:binary_to_integer/1 and do not bound its length. A literal of one million digits decodes successfully but costs 100 to 300 times as much CPU as a string of the same length, so one request body of a few megabytes holds a scheduler for about a second. A literal of more than about 1.29 million digits raises SystemLimitError. Applications generated by phx.new decode request bodies with JSON in Plug.Parsers, before routing and authentication.\n\nThis issue affects elixir: from 1.18.0-rc.0 before 1.18.6, from 1.19.0-rc.0 before 1.19.7, and from 1.20.0-rc.0 before 1.20.5."
}
],
"id": "CVE-2026-115274",
"lastModified": "2026-10-30T19:39:14.897",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"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:N/PR:N/UI:N/VC:N/VI:N/VA:L/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",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-115274",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-30T16:51:17.679403Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-10-30T09:17:14.103",
"references": [
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://cna.erlef.org/cves/CVE-2026-115274.html"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/elixir-lang/elixir/commit/7154e8781da9fd016a973ea01776a011c8b5726a"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/elixir-lang/elixir/commit/793c1147210388587defb649f25f293ffbfa6b1b"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/elixir-lang/elixir/commit/c81f12265919c34a0d5134f1905a4eb4edaea1c2"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/elixir-lang/elixir/commit/cd158efacdc10b30232864251747dff9b8387dfe"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/elixir-lang/elixir/commit/ee5cc23f8928aa5a0f25bb7f28e42ecfc7b7d396"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/elixir-lang/elixir/security/advisories/GHSA-rp5q-xqhq-926h"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-115274"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"url": "https://github.com/elixir-lang/elixir/security/advisories/GHSA-rp5q-xqhq-926h"
}
],
"sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-1284"
}
],
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"type": "Secondary"
}
]
}
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