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vuln-cve/data/2026/58xxx/CVE-2026-58271.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-58271",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-29T21:54:30.332Z",
"datePublished": "2026-09-21T19:50:14.539Z",
"dateUpdated": "2026-09-24T22:36:41.527Z"
},
"containers": {
"cna": {
"title": "@sync-in/server vulnerable to TOTP Brute-Force via `POST /api/app/sync/register`",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-307",
"lang": "en",
"description": "CWE-307: Improper Restriction of Excessive Authentication Attempts",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/Sync-in/server/security/advisories/GHSA-274f-6w77-8qm9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/Sync-in/server/security/advisories/GHSA-274f-6w77-8qm9"
}
],
"affected": [
{
"vendor": "Sync-in",
"product": "server",
"versions": [
{
"version": "< 2.4.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-09-21T19:50:14.539Z"
},
"descriptions": [
{
"lang": "en",
"value": "Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, `POST /api/app/sync/register` accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, `SyncClientsManager.register()` calls `updateAccesses(user, ip, false)`, which hits a freeze branch that writes `passwordAttempts` back unchanged. The counter never reaches `USER_MAX_PASSWORD_ATTEMPTS` (10) and the lockout gate never fires. A successful guess returns a `{clientId, clientToken}` pair. The token can be exchanged via `POST /api/app/sync/auth/cookie` for a full JWT. While the code is valid, the attacker can also call `POST /api/auth/2fa/disable` to permanently remove MFA. Version 2.4.0 patches the issue."
}
],
"source": {
"advisory": "GHSA-274f-6w77-8qm9",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/Sync-in/server/security/advisories/GHSA-274f-6w77-8qm9",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-24T22:35:57.537707Z",
"id": "CVE-2026-58271",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"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": "2026-09-24T22:36:41.527Z"
}
}
]
}
}