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vuln-cve/data/2026/77xxx/CVE-2026-77358.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-77358",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-08-20T19:28:35.245Z",
"datePublished": "2026-08-27T22:37:14.339Z",
"dateUpdated": "2026-08-31T18:25:37.895Z"
},
"containers": {
"cna": {
"title": "cpp-httplib: Use-after-free of TLS session in WebSocketClient::shutdown_and_close()",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"lang": "en",
"description": "CWE-416: Use After Free",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-w7p7-f35j-mw7q",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-w7p7-f35j-mw7q"
},
{
"name": "https://github.com/yhirose/cpp-httplib/commit/2f986fd5e56e7c5f686d965174516360930f371d",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/yhirose/cpp-httplib/commit/2f986fd5e56e7c5f686d965174516360930f371d"
}
],
"affected": [
{
"vendor": "yhirose",
"product": "cpp-httplib",
"versions": [
{
"version": ">= 0.33.0, < 0.50.",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-08-27T22:37:14.339Z"
},
"descriptions": [
{
"lang": "en",
"value": "cpp-httplib is a C++ header-only HTTP/HTTPS library. In versions 0.33.0 through 0.50.0, the TLS-enabled WebSocket client frees the TLS session before closing the WebSocket that still uses it, producing a use-after-free. In WebSocketClient::shutdown_and_close the SSL object is freed and the pointer cleared, but the subsequent WebSocket close still sends a close frame through the SSL socket stream, which holds a raw copy of the now-dangling session pointer and reads from and writes to the freed memory. The same freed-then-used ordering is reachable through the client's destructor and its connect path, so ordinary teardown of a secure WebSocket connection triggers the defect. This issue is fixed in version 0.50.1."
}
],
"source": {
"advisory": "GHSA-w7p7-f35j-mw7q",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-w7p7-f35j-mw7q",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-31T18:25:12.543647Z",
"id": "CVE-2026-77358",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-08-31T18:25:37.895Z"
}
}
]
}
}