{"id":"CVE-2026-78359","revision":null,"records":[{"revision":"4f1b2822982147328233ccbc5863686d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-78359","aliases":[],"title":"Duplicate Identity / Identity Shadowing across CustomerUser backends","description":"OTRS does not sufficiently enforce the uniqueness of customer user identities across multiple configured CustomerUser backends.\u00A0When multiple backends, such as a database and LDAP, are configured, the uniqueness check for customer user email addresses is performed only within the selected backend. As a result, an authenticated user with permission to create or modify customer users may create a customer user whose email address is already assigned to a customer user in another backend.\n\nThis can result in multiple customer user records representing the same communication identity. Depending on the affected workflow and backend resolution, customer-related information or email communication may subsequently be associated with or exposed to the wrong customer user.\n\nThe vulnerability does not allow unauthenticated users to create customer accounts. Exploitation requires permissions to create or modify customer users.\n\nThis issue affects OTRS:\n\n  *  7.0.X\n  *  8.0.X\n  *  2023.X\n  *  2024.X\n  *  2025.X\n  *  2026.X before 2026.7.X\n\nPlease note that ((OTRS)) Community Edition 6.x and before are vulnerable. Products based on the ((OTRS)) Community Edition also very likely to be affected","state":0,"publishedAt":"2026-10-12T06:49:24.983+00:00","modifiedAt":"2026-10-15T19:15:00.046+00:00","affected":[{"ecosystem":"Vendor product","name":"OTRS","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"OTRS\",\n                    \"vendor\": \"OTRS GmbH (former OTRS AG)\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"7.0.x\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"8.0.x\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2023.x\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2024.x\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2025.x\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"2026.6.x\",\n                            \"status\": \"affected\",\n                            \"version\": \"2026.x\",\n                            \"versionType\": \"patch\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"((OTRS)) Community Edition","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"affected\",\n                    \"product\": \"((OTRS)) Community Edition\",\n                    \"vendor\": \"OTRS GmbH (former OTRS AG)\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"6.x\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://otrs.com/release-notes/otrs-security-advisory-2026-16/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-78359","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-78359","identifiers":["CVE-2026-78359"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-4fd8047eb31a4bcbbcf88601a1c55e9e","complete":false,"records":13655,"lastAttemptAt":"2026-11-09T14:16:13.6696219+00:00","lastSuccessAt":"2026-11-09T14:16:13.665+00:00","error":"10 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T14:16:13.665+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13697,"expectedIdentifiers":13707,"failedIdentifiers":10},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T14:04:00.1516715+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T14:04:00.1516715+00:00","lastSuccessAt":"2026-11-09T14:04:00.2978136+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.297814+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-fec5a400f2004099a6ceb2e015ba7713","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T14:04:00.8740665+00:00","lastSuccessAt":"2026-11-09T13:04:37.338+00:00","error":null,"lastVerifiedAt":"2026-11-09T13:04:37.338+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T14:04:00.1058982+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.1058982+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T14:02:14.6544671+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:02:14.6544671+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-c905fa1bd26c7b261e77cc7202a86dc766ff31c2b096b501f3bf44f561e34970","complete":true,"records":3063,"lastAttemptAt":"2026-11-09T14:04:00.1196922+00:00","lastSuccessAt":"2026-11-09T12:02:21.7931207+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.1196922+00:00","snapshotPublishedAt":"2026-11-09T11:18:00+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-0a2950eb931e2cbd521c1ee48327cd287727b9b342d55a1210c0101010ad92b5","complete":true,"records":231299,"lastAttemptAt":"2026-11-09T14:03:59.9741082+00:00","lastSuccessAt":"2026-11-09T14:03:58.6011989+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:03:59.9741082+00:00","snapshotPublishedAt":"2026-11-09T13:48:25+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}