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vuln-cve/data/2026/0xxx/CVE-2026-0865.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-0865",
"assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"state": "PUBLISHED",
"assignerShortName": "PSF",
"dateReserved": "2026-01-12T16:07:56.781Z",
"datePublished": "2026-01-20T21:26:15.274Z",
"dateUpdated": "2026-03-03T14:43:30.596Z"
},
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "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": "3.13.12",
"status": "affected",
"versionType": "python"
},
{
"version": "3.14.0",
"lessThan": "3.14.3",
"status": "affected",
"versionType": "python"
},
{
"version": "3.15.0a1",
"lessThan": "3.15.0a6",
"status": "affected",
"versionType": "python"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Omar M. Hasan"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "User-controlled header names and values containing newlines can allow injecting HTTP headers."
}
],
"value": "User-controlled header names and values containing newlines can allow injecting HTTP headers."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "HIGH",
"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:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-74",
"description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"shortName": "PSF",
"dateUpdated": "2026-03-03T14:43:30.596Z"
},
"references": [
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/pull/143917"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/python/cpython/issues/143916"
},
{
"tags": [
"vendor-advisory"
],
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/BJ6QPHNSHJTS3A7CFV6IBMCAP2DWRVNT/"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee58"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c510"
},
{
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"patch"
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"url": "https://github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c5"
},
{
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"patch"
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"url": "https://github.com/python/cpython/commit/f7fceed79ca1bceae8dbe5ba5bc8928564da7211"
},
{
"tags": [
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"url": "https://github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d2"
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"url": "https://github.com/python/cpython/commit/e4846a93ac07a8ae9aa18203af0dd13d6e7a6995"
},
{
"tags": [
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"url": "https://github.com/python/cpython/commit/66da7bf6fe7b81e3ecc9c0a25bd47d4616c8d1a6"
},
{
"tags": [
"patch"
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"url": "https://github.com/python/cpython/commit/83ecd18779f286d872f68bfce175651e407d9fff"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/bfba660085767f8c2d582134e9d511a85eda04cf"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5f"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/8bb044d29310bb05d15086cdaa8bf64867d61a97"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/c592227ffb48679af9845a45dbb0875d975bb219"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "wsgiref.headers.Headers allows header newline injection",
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-01-21T15:40:22.223517Z",
"id": "CVE-2026-0865",
"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": "2026-01-21T16:14:52.038Z"
}
}
]
}
}