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vuln-cve/data/2026/53xxx/CVE-2026-53540.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-53540",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-09T18:13:07.263Z",
"datePublished": "2026-06-22T16:58:54.923Z",
"dateUpdated": "2026-06-22T17:21:55.932Z"
},
"containers": {
"cna": {
"title": "Python-Multipart: Negative Content-Length in parse_form buffers the entire body in memory",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1284",
"lang": "en",
"description": "CWE-1284: Improper Validation of Specified Quantity in Input",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 3.7,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/Kludex/python-multipart/security/advisories/GHSA-v9pg-7xvm-68hf",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/Kludex/python-multipart/security/advisories/GHSA-v9pg-7xvm-68hf"
}
],
"affected": [
{
"vendor": "Kludex",
"product": "python-multipart",
"versions": [
{
"version": "< 0.0.31",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-06-22T16:58:54.923Z"
},
"descriptions": [
{
"lang": "en",
"value": "Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.31, parse_form() did not validate the Content-Length header before using it to bound its chunked read of the request body. A negative Content-Length turned the bounded read into a read-until-EOF, so the entire body was loaded into memory in a single read instead of in fixed-size chunks. This vulnerability is fixed in 0.0.31."
}
],
"source": {
"advisory": "GHSA-v9pg-7xvm-68hf",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-06-22T17:21:49.069742Z",
"id": "CVE-2026-53540",
"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": "2026-06-22T17:21:55.932Z"
}
}
]
}
}