{"id":"CVE-2026-105215","aliases":[],"cve":{"records":[{"id":"CVE-2026-105215","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-04T13:04:00.478Z","published":"2026-10-04T13:10:07.389Z","modified":"2026-10-29T21:15:34.442Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-29T21:15:34.442Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-05T13:28:36.853Z"}],"references":[{"url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-738m-7888-jfv8","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/zitadel-before-4.16.2-account-pre-hijacking-via-forged-external-idp-callback","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-290","description":"Authentication Bypass by Spoofing","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.16.2","versionStartIncluding":"4.0.0"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*","versionEndExcluding":"3.4.14"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-05T13:28:26.862481Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"total"}]}]},"title":"ZITADEL before 4.16.2 Account Pre-Hijacking via Forged External IdP Callback","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 UI because the 'external account not found' registration endpoint trusts client-supplied external identity fields without a completed IdP callback. Unauthenticated attackers can submit forged IDPConfigID and ExternalUserID values to pre-create an account bound to a victim's external IdP identity, which the victim's later genuine external login then signs into.","score":9.3,"severity":"critical","published":"2026-10-04T13:10:07.389Z","modified":"2026-10-29T21:15:34.442Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"zitadel","name":"zitadel","platforms":[],"versions":[{"version":"4.0.0","status":"affected","lessThan":"4.16.2","versionType":"semver"},{"version":"4.16.2","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-105215"},{"vendor":"zitadel","name":"zitadel","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"3.4.14","versionType":"semver"},{"version":"3.4.14","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-105215"}],"remediation":[],"references":["https://github.com/zitadel/zitadel/security/advisories/GHSA-738m-7888-jfv8","https://www.vulncheck.com/advisories/zitadel-before-4.16.2-account-pre-hijacking-via-forged-external-idp-callback"],"sources":[{"name":"CVE","id":"CVE-2026-105215","modified":"2026-10-29T21:15:34.442Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-105215"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":9.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1}],"sourceAffected":[],"observedAt":"2026-10-29T21:28:22.533Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T09:10:30.844Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T00:15:33.716Z","attemptedAt":"2026-10-30T00:15:33.716Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-30T00:15:33.808Z","attemptedAt":"2026-10-30T00:15:33.808Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T00:15:33.974Z","attemptedAt":"2026-10-30T00:15:33.974Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-30T00:15:33.310Z","attemptedAt":"2026-10-30T00:15:33.310Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-105215","url":"https://www.first.org/epss/","probability":0.00339,"percentile":0.2735,"date":"2026-10-29","checkedAt":"2026-10-30T00:15:33.310Z"},{"source":"NVD","id":"CVE-2026-105215","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105215","modified":"2026-10-29T21:17:10.043","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-10-30T00:15:33.716Z"},{"source":"NVD","id":"CVE-2026-105215","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105215","modified":"2026-10-29T21:17:10.043","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","checkedAt":"2026-10-30T00:15:33.716Z"},{"source":"GitHub Advisory Database","id":"GHSA-639g-x9rp-hw3x","url":"https://github.com/advisories/GHSA-639g-x9rp-hw3x","modified":"2026-10-04T15:30:29Z","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","checkedAt":"2026-10-30T00:15:33.808Z"},{"source":"ENISA EUVD","id":"EUVD-2026-92108","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-92108","modified":"Oct 29, 2026, 9:15:34 PM","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","checkedAt":"2026-10-30T00:15:33.974Z"}],"aiSummary":{"text":"ZITADEL before 3.4.14 and 4.x before 4.16.2 has an authentication bypass vulnerability. Unauthenticated attackers can submit forged IDPConfigID and ExternalUserID values to pre-create an account. This allows an attacker to bind a victim's external IdP identity to the pre-created account.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:35:34.798Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-105215"}]}}