CVE-2026-92387
Full vulnerability record from the local CVENow database.
Description
By permanently omitting the final control-response line, a malicious FTP, IMAP, POP3, or SMTP server can exploit libcurl and completely bypass its configured transfer timeout mechanism, indefinitely blocking all concurrent transfers bound to the same multi-handle.
Severity
HIGH
CVSS score
8.1
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
2499f714-1537-4658-8207-48ae4bb9eae9
Published
2026-10-20 21:17:21.133000
Last modified
2026-10-29 19:17:29.290000
View original CVE JSON
{
"id": "CVE-2026-92387",
"sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9",
"published": "2026-10-20T21:17:21.133",
"lastModified": "2026-10-29T19:17:29.290",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "By permanently omitting the final control-response line, a malicious FTP,\nIMAP, POP3, or SMTP server can exploit libcurl and completely bypass its\nconfigured transfer timeout mechanism, indefinitely blocking all concurrent\ntransfers bound to the same multi-handle."
}
],
"affected": [
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"affectedData": [
{
"vendor": "curl",
"product": "curl",
"defaultStatus": "unaffected",
"versions": [
{
"version": "8.22.0",
"lessThanOrEqual": "8.22.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.21.0",
"lessThanOrEqual": "8.21.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.20.0",
"lessThanOrEqual": "8.20.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.19.0",
"lessThanOrEqual": "8.19.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.18.0",
"lessThanOrEqual": "8.18.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.17.0",
"lessThanOrEqual": "8.17.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.16.0",
"lessThanOrEqual": "8.16.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.15.0",
"lessThanOrEqual": "8.15.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.14.1",
"lessThanOrEqual": "8.14.1",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.14.0",
"lessThanOrEqual": "8.14.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.13.0",
"lessThanOrEqual": "8.13.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.12.1",
"lessThanOrEqual": "8.12.1",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.12.0",
"lessThanOrEqual": "8.12.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.11.1",
"lessThanOrEqual": "8.11.1",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.11.0",
"lessThanOrEqual": "8.11.0",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.10.1",
"lessThanOrEqual": "8.10.1",
"versionType": "semver",
"status": "affected"
},
{
"version": "8.10.0",
"lessThanOrEqual": "8.10.0",
"versionType": "semver",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.2,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-29T19:02:45.747728Z",
"id": "CVE-2026-92387",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-835"
}
]
}
],
"references": [
{
"url": "https://curl.se/docs/CVE-2026-92387.html",
"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
},
{
"url": "https://curl.se/docs/CVE-2026-92387.json",
"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
},
{
"url": "https://hackerone.com/reports/4022003",
"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
},
{
"url": "https://hackerone.com/reports/4022003",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
]
}