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vuln-cve/data/2026/39xxx/CVE-2026-39360.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-39360",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-04-06T21:29:17.349Z",
"datePublished": "2026-04-07T18:58:29.974Z",
"dateUpdated": "2026-04-07T19:28:22.541Z"
},
"containers": {
"cna": {
"title": "RustFS has an authorization bypass in multipart UploadPartCopy enables cross-bucket object exfiltration",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-862",
"lang": "en",
"description": "CWE-862: Missing Authorization",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/rustfs/rustfs/security/advisories/GHSA-mx42-j6wv-px98",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-mx42-j6wv-px98"
}
],
"affected": [
{
"vendor": "rustfs",
"product": "rustfs",
"versions": [
{
"version": "< alpha.90",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-04-07T18:58:29.974Z"
},
"descriptions": [
{
"lang": "en",
"value": "RustFS is a distributed object storage system built in Rust. Prior to alpha.90, RustFS contains a missing authorization check in the multipart copy path (UploadPartCopy). A low-privileged user who cannot read objects from a victim bucket can still exfiltrate victim objects by copying them into an attacker-controlled multipart upload and completing the upload. This breaks tenant isolation in multi-user / multi-tenant deployments. This vulnerability is fixed in alpha.90."
}
],
"source": {
"advisory": "GHSA-mx42-j6wv-px98",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-04-07T19:28:14.077610Z",
"id": "CVE-2026-39360",
"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": "2026-04-07T19:28:22.541Z"
}
}
]
}
}