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vuln-cve/data/2025/13xxx/CVE-2025-13836.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-13836",
"assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"state": "PUBLISHED",
"assignerShortName": "PSF",
"dateReserved": "2025-12-01T17:54:40.759Z",
"datePublished": "2025-12-01T18:02:38.483Z",
"dateUpdated": "2026-03-03T14:41:48.702Z"
},
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"modules": [
"http.client"
],
"product": "CPython",
"repo": "https://github.com/python/cpython",
"vendor": "Python Software Foundation",
"versions": [
{
"version": "0",
"lessThan": "3.10.20",
"status": "affected",
"versionType": "python"
},
{
"version": "3.11.0",
"lessThan": "3.11.15",
"status": "affected",
"versionType": "python"
},
{
"version": "3.12.0",
"lessThan": "3.12.13",
"status": "affected",
"versionType": "python"
},
{
"version": "3.13.0",
"lessThan": "3.13.11",
"status": "affected",
"versionType": "python"
},
{
"version": "3.14.0",
"lessThan": "3.14.1",
"status": "affected",
"versionType": "python"
},
{
"version": "3.15.0a1",
"lessThan": "3.15.0a3",
"status": "affected",
"versionType": "python"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS."
}
],
"value": "When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"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:L",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"providerMetadata": {
"orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"shortName": "PSF",
"dateUpdated": "2026-03-03T14:41:48.702Z"
},
"references": [
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/python/cpython/issues/119451"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/pull/119454"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/4ce27904b597c77d74dd93f2c912676021a99155"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/5a4c4a033a4a54481be6870aa1896fad732555b5"
},
{
"tags": [
"vendor-advisory"
],
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/OQ6G7MKRQIS3OAREC3HNG3D2DPOU34XO/"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/289f29b0fe38baf2d7cb5854f4bb573cc34a6a15"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/14b1fdb0a94b96f86fc7b86671ea9582b8676628"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/5dc101675fd22918facbbe0fecdc821502beaaf0"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/afc40bdd3dd71f343fd9016f6d8eebbacbd6587c"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Excessive read buffering DoS in http.client",
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-400",
"lang": "en",
"description": "CWE-400 Uncontrolled Resource Consumption"
}
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2025-12-01T18:32:37.506031Z",
"id": "CVE-2025-13836",
"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": "2025-12-02T18:29:21.886Z"
}
}
]
}
}