{"id":"EUVD-2026-95993","revision":"3473d908afdf413b8c86cee2d3d6e6b7","records":[{"revision":"3473d908afdf413b8c86cee2d3d6e6b7","observedAt":"2026-10-30T22:49:09.368+00:00","statement":{"source":"euvd","id":"EUVD-2026-95993","aliases":["CVE-2026-62367","GHSA-xv7q-fvmc-jx96"],"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":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","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","score":7.5,"severity":null}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-xv7q-fvmc-jx96","https://github.com/go-vikunja/vikunja/commit/7854f2729ab72000210b61c25929678fd6901630","https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95993","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 9, 2026, 8:49:08 PM","dateUpdated":"Oct 13, 2026, 8:25:26 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-95993","identifiers":["EUVD-2026-95993","CVE-2026-62367","GHSA-xv7q-fvmc-jx96"]},"retained":false,"historicalAffected":[]}],"coverage":[]}