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vuln-cve/data/2026/53xxx/CVE-2026-53609.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-53609",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-09T19:39:52.404Z",
"datePublished": "2026-06-12T20:59:25.486Z",
"dateUpdated": "2026-06-15T18:29:55.055Z"
},
"containers": {
"cna": {
"title": "Apostrophe has Server-Side Prototype Pollution in apos.util.set via patch operators that leads to process-wide authorization bypass",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1321",
"lang": "en",
"description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-6h5j-32cf-4253",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-6h5j-32cf-4253"
}
],
"affected": [
{
"vendor": "apostrophecms",
"product": "apostrophe",
"versions": [
{
"version": "<= 4.30.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-06-12T20:59:25.486Z"
},
"descriptions": [
{
"lang": "en",
"value": "ApostropheCMS is an open-source Node.js content management system. In versions up to and including 4.30.0, `apos.util.set()` traverses dot-notation paths without sanitizing `__proto__`, allowing an authenticated editor to write arbitrary values to `Object.prototype` via the `$pullAll` patch operator. A confirmed gadget in `publicApiCheck()` causes this to bypass authorization on all piece-type REST API endpoints for every subsequent unauthenticated request, for the lifetime of the Node.js process. As of time of publication, no known patched versions are available."
}
],
"source": {
"advisory": "GHSA-6h5j-32cf-4253",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-6h5j-32cf-4253",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-06-15T18:29:44.669655Z",
"id": "CVE-2026-53609",
"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": "2026-06-15T18:29:55.055Z"
}
}
]
}
}