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vuln-cve/data/2026/100xxx/CVE-2026-100678.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-100678",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-09-26T02:36:51.809Z",
"datePublished": "2026-09-26T13:23:40.935Z",
"dateUpdated": "2026-09-30T15:00:30.440Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck",
"dateUpdated": "2026-09-26T13:23:40.935Z"
},
"datePublic": "2026-09-11T00:00:00.000Z",
"title": "stoatchat before 0.15.5 MFA Brute Force via Insufficient Rate Limiting",
"descriptions": [
{
"lang": "en",
"value": "stoatchat before 0.15.5 fails to enforce account-level attempt limits on MFA login challenges, allowing attackers who know a password to guess TOTP codes with only IP-based rate limiting. Attackers can reuse MFA challenge tickets across multiple failed attempts and distribute guesses across IP addresses to bypass rate limiting and gain account access."
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Improper Restriction of Excessive Authentication Attempts",
"cweId": "CWE-307",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "stoatchat",
"product": "stoatchat",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "semver",
"lessThan": "0.15.5"
},
{
"version": "0.15.5",
"status": "unaffected",
"versionType": "semver"
}
]
}
],
"metrics": [
{
"format": "CVSS",
"cvssV4_0": {
"version": "4.0",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "LOW",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 8.3,
"baseSeverity": "HIGH"
}
},
{
"format": "CVSS",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM"
}
}
],
"references": [
{
"url": "https://github.com/stoatchat/stoatchat/security/advisories/GHSA-6877-g673-f5r8",
"tags": [
"vendor-advisory"
],
"name": "GitHub Security Advisory (GHSA-6877-g673-f5r8)"
},
{
"name": "VulnCheck Advisory: stoatchat before 0.15.5 MFA Brute Force via Insufficient Rate Limiting",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-mfa-brute-force-via-insufficient-rate-limiting"
}
],
"credits": [
{
"lang": "en",
"value": "QuentinRa",
"type": "reporter"
}
],
"x_generator": {
"engine": "vulncheck-endgame"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/stoatchat/stoatchat/security/advisories/GHSA-6877-g673-f5r8",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-30T14:59:59.255314Z",
"id": "CVE-2026-100678",
"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": "2026-09-30T15:00:30.440Z"
}
}
]
}
}