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vuln-cve/data/2026/87xxx/CVE-2026-87803.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-87803",
"assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
"state": "PUBLISHED",
"assignerShortName": "snyk",
"dateReserved": "2026-09-09T10:11:56.597Z",
"datePublished": "2026-09-10T09:54:01.912Z",
"dateUpdated": "2026-09-10T13:17:16.963Z"
},
"containers": {
"cna": {
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"exploitCodeMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"
},
"cvssV4_0": {
"version": "4.0",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "LOW",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
}
}
],
"credits": [
{
"value": "Catalin Iovita (Snyk Security Research)",
"lang": "en"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "Countly DBViewer authorization bypass via nested aggregation stage poisoning",
"lang": "en"
}
]
}
],
"providerMetadata": {
"orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
"shortName": "snyk",
"dateUpdated": "2026-09-10T12:00:48.815Z"
},
"descriptions": [
{
"value": "An authorization bypass vulnerability exists in the Countly Server DBViewer due to flawed sub-pipeline detection in the aggregation stage sanitizer. The /o/db aggregation endpoint parses user-controlled aggregation JSON and passes it through a stage sanitizer that determines whether a nested array is a sub-pipeline by checking if every element contains a key present in a hardcoded KNOWN_STAGE_OPERATORS set. If any element contains an unrecognized stage key, such as the undocumented MongoDB-internal $_internalInhibitOptimization, the sanitizer misclassifies the entire branch as a generic array and skips stage-level stripping for all sibling stages. This allows a non-admin user with DBViewer read permission to inject forbidden operators like $lookup inside $facet sub-pipelines, performing cross-collection joins into restricted collections. This leads to unauthorized read access to sensitive data including password-reset tokens (prid), enabling account takeover.",
"lang": "en"
}
],
"references": [
{
"url": "https://github.com/Countly/countly-server/pull/7868"
}
],
"affected": [
{
"product": "countly-server",
"versions": [
{
"version": "0",
"lessThan": "25.03.53-LTS",
"status": "affected",
"versionType": "semver"
}
],
"vendor": "Countly"
}
]
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-10T13:16:57.956270Z",
"id": "CVE-2026-87803",
"options": [
{
"Exploitation": "none"
},
{
"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": "2026-09-10T13:17:16.963Z"
}
}
]
}
}