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vuln-cve/data/2026/17xxx/CVE-2026-17545.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-17545",
"assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
"state": "PUBLISHED",
"assignerShortName": "php",
"dateReserved": "2026-07-27T10:15:15.310Z",
"datePublished": "2026-09-25T20:18:11.288Z",
"dateUpdated": "2026-09-25T20:43:34.157Z"
},
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"cna": {
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"shortName": "php",
"dateUpdated": "2026-09-25T20:18:11.288Z"
},
"title": "PHP on Windows: Reserved Device Names Are Not Rejected Before File/Stream I/O which can cause DoS",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-67",
"description": "CWE-67 Improper handling of windows device names",
"type": "CWE"
}
]
}
],
"impacts": [
{
"capecId": "CAPEC-165",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-165 File Manipulation"
}
]
}
],
"affected": [
{
"vendor": "PHP Group",
"product": "PHP",
"versions": [
{
"status": "affected",
"version": "8.2.*",
"lessThan": "8.2.34",
"versionType": "semver"
},
{
"status": "affected",
"version": "8.3.*",
"lessThan": "8.3.35",
"versionType": "semver"
},
{
"status": "affected",
"version": "8.4.*",
"lessThan": "8.4.26",
"versionType": "semver"
},
{
"status": "affected",
"version": "8.5.*",
"lessThan": "8.5.11",
"versionType": "semver"
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"lang": "en",
"value": "On Windows, PHP's filesystem and stream APIs do not reject reserved device names such as CON, PRN, AUX, NUL, COM1 to COM9, LPT1 to LPT9, CONIN$ and CONOUT$ when they appear as a component of a path. An attacker-controlled filename therefore reaches CreateFileW() and opens a device instead of the regular file the application expected, which can block or hang the request and exhaust worker processes.",
"supportingMedia": [
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"base64": false,
"value": "<p>On Windows, PHP's filesystem and stream APIs do not reject reserved device names such as <code>CON</code>, <code>PRN</code>, <code>AUX</code>, <code>NUL</code>, <code>COM1</code> to <code>COM9</code>, <code>LPT1</code> to <code>LPT9</code>, <code>CONIN$</code> and <code>CONOUT$</code> when they appear as a component of a path. An attacker-controlled filename therefore reaches <code>CreateFileW()</code> and opens a device instead of the regular file the application expected, which can block or hang the request and exhaust worker processes.</p>"
}
]
}
],
"references": [
{
"url": "https://github.com/php/php-src/security/advisories/GHSA-9f67-6fw4-hpfp",
"tags": [
"vendor-advisory"
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}
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"format": "CVSS",
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"lang": "en",
"value": "GENERAL"
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"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subAvailabilityImpact": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "MEDIUM",
"baseScore": 6.9,
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:H"
}
}
],
"credits": [
{
"lang": "en",
"value": "@Crispr (GitHub)",
"type": "reporter"
},
{
"lang": "en",
"value": "@OSTIF-Derek",
"type": "reporter"
},
{
"lang": "en",
"value": "Shivam Mathur",
"type": "remediation developer"
},
{
"lang": "en",
"value": "Jakub Zelenka",
"type": "remediation reviewer"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.5"
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},
"adp": [
{
"references": [
{
"url": "https://github.com/php/php-src/security/advisories/GHSA-9f67-6fw4-hpfp",
"tags": [
"exploit"
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"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-25T20:43:10.043800Z",
"id": "CVE-2026-17545",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
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}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-25T20:43:34.157Z"
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}
}