{"id":"EUVD-2026-78656","revision":"76a8c37ed54e418aa9eb86bb37d09e9d","records":[{"revision":"76a8c37ed54e418aa9eb86bb37d09e9d","observedAt":"2026-10-30T12:53:24.125+00:00","statement":{"source":"euvd","id":"EUVD-2026-78656","aliases":["CVE-2026-91985","GHSA-37rx-7pj5-p885","GHSA-qfwc-vx6f-3g6g"],"title":"Vikunja before 2.6.0 fails to properly restrict access to the link-share hash field in single-share read endpoints, allowing read-only members to obtain the share's secret credential. Attackers can exchange the disclosed hash for a link-sha…","description":"Vikunja before 2.6.0 fails to properly restrict access to the link-share hash field in single-share read endpoints, allowing read-only members to obtain the share's secret credential. Attackers can exchange the disclosed hash for a link-share JWT at the share's permission level to escalate privileges and perform unauthorized writes or administrative actions.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.7,"severity":null}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qfwc-vx6f-3g6g","https://www.vulncheck.com/advisories/vikunja-before-2.6.0-privilege-escalation-via-link-share-hash"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-78656","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 15, 2026, 3:18:28 PM","dateUpdated":"Sep 15, 2026, 4:04:15 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-2026-78656","identifiers":["EUVD-2026-78656","CVE-2026-91985","GHSA-37rx-7pj5-p885","GHSA-qfwc-vx6f-3g6g"]},"retained":false,"historicalAffected":[]}],"coverage":[]}