{"id":"CVE-2026-41161","state":"PUBLISHED","title":"Username Enumeration via Timing Attack","description":"Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.2.0, the /api/auth/login endpoint contains a logic flaw that allows unauthenticated remote attackers to enumerate valid usernames by measuring the application's response time. This issue has been patched in version 2.2.0.","publishedAt":"2026-05-08T13:00:54.485Z","updatedAt":"2026-05-11T18:24:40.217Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["Sync-in server"],"affected":[{"vendor":"Sync-in","product":"server","versions":[{"version":"< 2.2.0","status":"affected"}]}],"references":["https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5","https://github.com/Sync-in/server/releases/tag/v2.2.0"],"weaknesses":["CWE-208"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41161.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41161","state":"PUBLISHED","datePublished":"2026-05-08T13:00:54.485Z","dateUpdated":"2026-05-11T18:24:40.217Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-17T16:34:45.524Z"},"containers":{"cna":{"title":"Username Enumeration via Timing Attack","descriptions":[{"lang":"en","value":"Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.2.0, the /api/auth/login endpoint contains a logic flaw that allows unauthenticated remote attackers to enumerate valid usernames by measuring the application's response time. This issue has been patched in version 2.2.0."}],"affected":[{"vendor":"Sync-in","product":"server","versions":[{"version":"< 2.2.0","status":"affected"}]}],"references":[{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5","name":"https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/Sync-in/server/releases/tag/v2.2.0","name":"https://github.com/Sync-in/server/releases/tag/v2.2.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-208","lang":"en","description":"CWE-208: Observable Timing Discrepancy","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-08T13:00:54.485Z"},"source":{"advisory":"GHSA-43fj-qp3h-hrh5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-11T18:23:52.865549Z","id":"CVE-2026-41161","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-11T18:24:40.217Z"}}]}}}