{"id":"CVE-2026-62367","revision":"2a65eaa500d64d4fa3cd7528201e1902","records":[{"revision":"2a65eaa500d64d4fa3cd7528201e1902","observedAt":"2026-10-25T14:19:28.838+00:00","statement":{"source":"nvd","id":"CVE-2026-62367","aliases":[],"title":"Vikunja is an open-source self-hosted task management platform. In versions 1.0.0 through 2.3.0, when an administrator enables the per-provider `emailfallback` option on an OpenID Connect provider, Vikunja links an SSO login to a pre-existi…","description":"Vikunja is an open-source self-hosted task management platform. In versions 1.0.0 through 2.3.0, when an administrator enables the per-provider `emailfallback` option on an OpenID Connect provider, Vikunja links an SSO login to a pre-existing local (username+password) account using only the `email` claim from the IdP. The fallback never checks an `email_verified` (or Microsoft `xms_edov`) signal and never requires the matched account's password. An attacker who can obtain a token from the configured issuer carrying a victim's email logs in as that victim with a full session, with no consent or interaction from the victim. Version 2.4.0 fixes the issue.","state":0,"publishedAt":"2026-10-09T21:17:05.47+00:00","modifiedAt":"2026-10-16T20:04:29.76+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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","score":7.5,"severity":"HIGH"}],"references":["https://github.com/go-vikunja/vikunja/commit/7854f2729ab72000210b61c25929678fd6901630","https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-xv7q-fvmc-jx96"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-62367","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-287","CWE-290","CWE-345"],"productCriteria":[],"sourceDates":{"published":"2026-10-09T21:17:05.470","lastModified":"2026-10-16T20:04:29.760"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-62367","identifiers":["CVE-2026-62367"]},"retained":false,"historicalAffected":[]}],"coverage":[]}