{"id":"EUVD-2026-78652","revision":"9a3cfc5261fd425db38fd4aa6b605012","records":[{"revision":"9a3cfc5261fd425db38fd4aa6b605012","observedAt":"2026-11-05T14:40:49.052+00:00","statement":{"source":"euvd","id":"EUVD-2026-78652","aliases":["CVE-2026-91981","GHSA-vcgv-7rvm-m3vp","GHSA-vfxw-3x8p-2vjr"],"title":"Vikunja versions before 2.6.0 fail to properly validate link-share tokens in the v2 API user search endpoints. Attackers with a read-only share link can enumerate project users via the projects endpoint and confirm arbitrary usernames exist…","description":"Vikunja versions before 2.6.0 fail to properly validate link-share tokens in the v2 API user search endpoints. Attackers with a read-only share link can enumerate project users via the projects endpoint and confirm arbitrary usernames exist via the global search endpoint.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":null}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-vfxw-3x8p-2vjr","https://www.vulncheck.com/advisories/vikunja-before-2.6.0-user-enumeration-via-v2-api"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-78652","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 15, 2026, 3:18:25 PM","dateUpdated":"Sep 21, 2026, 6:47:28 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-2026-78652","identifiers":["EUVD-2026-78652","CVE-2026-91981","GHSA-vcgv-7rvm-m3vp","GHSA-vfxw-3x8p-2vjr"]},"retained":false,"historicalAffected":[]}],"coverage":[]}