{"id":"CVE-2026-74864","state":"PUBLISHED","title":"Authentication Bypass in sogo_yhn","description":"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.","publishedAt":"2026-09-30T12:02:29.340Z","updatedAt":"2026-09-30T12:50:52.363Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"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","source":"CERT-PL"},"assigner":"CERT-PL","products":["YunoHost-Apps sogo_yhn"],"affected":[{"vendor":"YunoHost-Apps","product":"sogo_yhn","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.8.0~ynh9","versionType":"custom"}],"repo":"https://github.com/YunoHost-Apps/sogo_ynh"}],"references":["https://cert.pl/en/posts/2026/09/CVE-2026-74864","https://forum.yunohost.org/t/sogo-critical-vulnerability-fixed-in-5-8-0-ynh9/42699"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74864.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74864","state":"PUBLISHED","datePublished":"2026-09-30T12:02:29.340Z","dateUpdated":"2026-09-30T12:50:52.363Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-08-17T10:19:51.723Z"},"containers":{"cna":{"title":"Authentication Bypass in sogo_yhn","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."}],"affected":[{"vendor":"YunoHost-Apps","product":"sogo_yhn","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.8.0~ynh9","versionType":"custom"}],"repo":"https://github.com/YunoHost-Apps/sogo_ynh"}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639 Authorization bypass through User-Controlled key","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-09-30T12:02:29.340Z"},"tags":["x_open-source"],"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":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T12:50:52.363Z"}}]}}}