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vuln-cve/data/2026/73xxx/CVE-2026-73259.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-73259",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-08-11T17:18:01.598Z",
"datePublished": "2026-08-20T17:39:16.147Z",
"dateUpdated": "2026-08-20T19:51:19.095Z"
},
"containers": {
"cna": {
"title": "Mongoose: Reflected XSS via decoded URI in directory listing render",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"lang": "en",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/cesanta/mongoose/security/advisories/GHSA-9cwm-487w-h25w",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/cesanta/mongoose/security/advisories/GHSA-9cwm-487w-h25w"
},
{
"name": "https://github.com/cesanta/mongoose/pull/3611",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/cesanta/mongoose/pull/3611"
},
{
"name": "https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71"
},
{
"name": "https://github.com/cesanta/mongoose/releases/tag/7.22",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/cesanta/mongoose/releases/tag/7.22"
}
],
"affected": [
{
"vendor": "cesanta",
"product": "mongoose",
"versions": [
{
"version": "< 7.22",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-08-20T17:39:16.147Z"
},
"descriptions": [
{
"lang": "en",
"value": "Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can send a crafted percent-encoded request path to a deployment using MG_ENABLE_DIRLIST and persuade a user to visit it. The mg_http_serve_dir() and listdir() path in src/http.c places the decoded request URI into the title and h1 elements without HTML entity encoding. The resulting reflected cross-site scripting executes in the Mongoose origin and can expose session data or perform actions as the victim. This issue is fixed in version 7.22."
}
],
"source": {
"advisory": "GHSA-9cwm-487w-h25w",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/cesanta/mongoose/security/advisories/GHSA-9cwm-487w-h25w",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-20T19:50:57.116455Z",
"id": "CVE-2026-73259",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"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": "2026-08-20T19:51:19.095Z"
}
}
]
}
}