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vuln-cve/data/2026/14xxx/CVE-2026-14540.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-14540",
"assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
"state": "PUBLISHED",
"assignerShortName": "Google",
"dateReserved": "2026-07-03T03:28:09.464Z",
"datePublished": "2026-07-31T01:46:54.942Z",
"dateUpdated": "2026-07-31T16:12:49.663Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
"shortName": "Google",
"dateUpdated": "2026-07-31T01:46:54.942Z"
},
"title": "Server-Side Request Forgery via Unrestricted HTTP Redirection in MCP Toolbox",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-918",
"description": "CWE-918 (Server-Side Request Forgery (SSRF))",
"type": "CWE"
}
]
}
],
"impacts": [
{
"capecId": "CAPEC-664",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-664 Server Side Request Forgery"
}
]
}
],
"affected": [
{
"vendor": "Google",
"product": "mcp-toolbox",
"versions": [
{
"status": "affected",
"version": "0.3.0",
"lessThanOrEqual": "1.4.0",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
],
"descriptions": [
{
"lang": "en",
"value": "A Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Google mcp-toolbox versions 0.3.0 through 1.4.0. While the toolbox implements baseline input sanitization for user-controlled parameters, the underlying HTTP client (internal/sources/http/http.go) fails to safely regulate request redirection boundaries. Specifically, the client is initialized without a restrictive CheckRedirect policy hook and lacks target IP validation. An attacker or a malicious data-driven prompt can supply a crafted path parameter that triggers an open redirect or a direct destination swap on the target backend, coercing the mcp-toolbox into blindly following the redirection and making unauthorized requests to internal or arbitrary external endpoints.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "A Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Google mcp-toolbox versions 0.3.0 through 1.4.0. While the toolbox implements baseline input sanitization for user-controlled parameters, the underlying HTTP client (internal/sources/http/http.go) fails to safely regulate request redirection boundaries. Specifically, the client is initialized without a restrictive CheckRedirect policy hook and lacks target IP validation. An attacker or a malicious data-driven prompt can supply a crafted path parameter that triggers an open redirect or a direct destination swap on the target backend, coercing the mcp-toolbox into blindly following the redirection and making unauthorized requests to internal or arbitrary external endpoints."
}
]
}
],
"references": [
{
"url": "https://github.com/googleapis/mcp-toolbox/pull/3448"
}
],
"metrics": [
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"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
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],
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "UNREPORTED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "HIGH",
"baseScore": 8,
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U"
}
}
],
"credits": [
{
"lang": "en",
"value": "Syed Anas Mohiuddin",
"type": "finder"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.2"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-31T16:12:37.398569Z",
"id": "CVE-2026-14540",
"options": [
{
"Exploitation": "none"
},
{
"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": "2026-07-31T16:12:49.663Z"
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]
}
}