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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-74864",
"assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
"state": "PUBLISHED",
"assignerShortName": "CERT-PL",
"dateReserved": "2026-08-17T10:19:51.723Z",
"datePublished": "2026-09-30T12:02:29.340Z",
"dateUpdated": "2026-09-30T12:50:52.363Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
"shortName": "CERT-PL",
"dateUpdated": "2026-09-30T12:02:29.340Z"
},
"title": "Authentication Bypass in sogo_yhn",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-639",
"description": "CWE-639 Authorization bypass through User-Controlled key",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "YunoHost-Apps",
"product": "sogo_yhn",
"repo": "https://github.com/YunoHost-Apps/sogo_ynh",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "5.8.0~ynh9",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
}
],
"descriptions": [
{
"lang": "en",
"value": "sogo_yhn configures SOGo with a parameter that forces the request with HTTP header \"x-webobjects-remote-user\" to be treated as sent by a verified user without performing password validation. Since Nginx does not strip this header, any client can supply it arbitrarily and gain access as any user, including a privileged user, without providing a password.\n\n\n\n\nThis issue was fixed in version 5.8.0~ynh9.",
"supportingMedia": [
{
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"value": "<div>sogo_yhn configures SOGo with a parameter that forces the request with HTTP header \"x-webobjects-remote-user\" to be treated as sent by a verified user without performing password validation.&nbsp;Since Nginx does not strip this header, any client can supply it arbitrarily and gain access as any user, including a privileged user, without providing a password.</div><div><br></div><div>This issue was fixed in version&nbsp;5.8.0~ynh9.</div>"
}
]
}
],
"tags": [
"x_open-source"
],
"references": [
{
"url": "https://cert.pl/en/posts/2026/09/CVE-2026-74864",
"tags": [
"third-party-advisory"
]
},
{
"url": "https://forum.yunohost.org/t/sogo-critical-vulnerability-fixed-in-5-8-0-ynh9/42699",
"tags": [
"issue-tracking"
]
}
],
"metrics": [
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
],
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "CRITICAL",
"baseScore": 9.3,
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
}
}
],
"credits": [
{
"lang": "en",
"value": "Przemysław Knycz WeKrwi.IT https://github.com/djrzulf",
"type": "finder"
}
],
"source": {
"discovery": "EXTERNAL"
},
"x_generator": {
"engine": "Vulnogram 1.0.3"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-30T12:50:42.911688Z",
"id": "CVE-2026-74864",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"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": "2026-09-30T12:50:52.363Z"
}
}
]
}
}