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vuln-cve/data/2026/45xxx/CVE-2026-45372.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-45372",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-05-12T00:51:29.086Z",
"datePublished": "2026-05-29T19:21:12.313Z",
"dateUpdated": "2026-06-01T17:57:44.116Z"
},
"containers": {
"cna": {
"title": "cpp-httplib: HTTP header value percent-decoding in server-side `parse_header` enables CRLF injection",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-93",
"lang": "en",
"description": "CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-444",
"lang": "en",
"description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 9.9,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xjxg-64p4-vj4m",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xjxg-64p4-vj4m"
}
],
"affected": [
{
"vendor": "yhirose",
"product": "cpp-httplib",
"versions": [
{
"version": "< 0.44.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-05-29T19:21:12.313Z"
},
"descriptions": [
{
"lang": "en",
"value": "cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, when cpp-httplib's server parses an incoming request, it applies percent-decoding to every header value except Location and Referer. The validity check (is_field_value) is run before decoding, so encoded %0D%0A passes the check and is then expanded to a literal \\r\\n byte pair inside the stored header value. This vulnerability is fixed in 0.44.0."
}
],
"source": {
"advisory": "GHSA-xjxg-64p4-vj4m",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xjxg-64p4-vj4m",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-06-01T17:57:24.969798Z",
"id": "CVE-2026-45372",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"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": "2026-06-01T17:57:44.116Z"
}
}
]
}
}