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vuln-cve/data/2026/91xxx/CVE-2026-91766.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-91766",
"assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
"state": "PUBLISHED",
"assignerShortName": "php",
"dateReserved": "2026-09-15T00:38:24.146Z",
"datePublished": "2026-09-25T20:40:25.040Z",
"dateUpdated": "2026-09-28T13:31:31.921Z"
},
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"shortName": "php",
"dateUpdated": "2026-09-25T20:40:25.040Z"
},
"title": "Cross-origin credential leak in HTTP stream wrapper redirects",
"problemTypes": [
{
"descriptions": [
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"lang": "en",
"cweId": "CWE-200",
"description": "CWE-200",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-522",
"description": "CWE-522",
"type": "CWE"
}
]
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "CWE-200"
}
]
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],
"affected": [
{
"vendor": "PHP Group",
"product": "PHP",
"packageName": "ext-standard",
"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"
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{
"status": "affected",
"version": "8.5.*",
"lessThan": "8.5.11",
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"defaultStatus": "unaffected"
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"descriptions": [
{
"lang": "en",
"value": "When the http:// stream wrapper follows a redirect it forwards the user-supplied Authorization, Cookie and Proxy-Authorization headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 ( CVE-2018-1000007 https://github.com/advisories/GHSA-g7x2-hrfp-pv5f ).",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<p>When the <code>http://</code> stream wrapper follows a redirect it forwards the user-supplied <code>Authorization</code>, <code>Cookie</code> and <code>Proxy-Authorization</code> headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 (<a title=\"CVE-2018-1000007\" href=\"https://github.com/advisories/GHSA-g7x2-hrfp-pv5f\">CVE-2018-1000007</a>).</p>"
}
]
}
],
"references": [
{
"url": "https://github.com/php/php-src/security/advisories/GHSA-fpwc-w8rq-cr92",
"tags": [
"vendor-advisory"
]
}
],
"metrics": [
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"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
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],
"cvssV3_1": {
"version": "3.1",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE",
"baseSeverity": "MEDIUM",
"baseScore": 5.9,
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
}
],
"credits": [
{
"lang": "en",
"value": "@q2a3z (GitHub)",
"type": "reporter"
},
{
"lang": "en",
"value": "Ilia Alshanetsky",
"type": "reporter"
},
{
"lang": "en",
"value": "Alexandre Daubois",
"type": "remediation developer"
},
{
"lang": "en",
"value": "Tim Düsterhus",
"type": "remediation reviewer"
},
{
"lang": "en",
"value": "Arnaud Le Blanc",
"type": "remediation reviewer"
},
{
"lang": "en",
"value": "Jakub Zelenka",
"type": "remediation reviewer"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.5"
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},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-91766",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-09-28T12:56:20.823835Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-28T13:31:31.921Z"
}
}
]
}
}