{"id":"GHSA-37rx-7pj5-p885","revision":"7b89f577c3d044f2b55a1481bd3c3b82","records":[{"revision":"7b89f577c3d044f2b55a1481bd3c3b82","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-37rx-7pj5-p885","aliases":[],"title":"Duplicate Advisory: Vikunja: Read-only project members can obtain any link share's access hash via the single-share read endpoint (v1 and v2) and escalate to the share's permission level","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-qfwc-vx6f-3g6g. This link is maintained to preserve external references.\n\n### Original Description\nVikunja 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":2,"publishedAt":"2026-09-15T18:32:30+00:00","modifiedAt":"2026-10-09T21:00:05.5281671+00:00","affected":[{"ecosystem":"Go","name":"code.vikunja.io/api","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"2.5.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":null,"severity":null},{"system":"CVSS_V4","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/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":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qfwc-vx6f-3g6g","https://nvd.nist.gov/vuln/detail/CVE-2026-91985","https://www.vulncheck.com/advisories/vikunja-before-2.6.0-privilege-escalation-via-link-share-hash"],"sourceUrl":"https://github.com/advisories/GHSA-37rx-7pj5-p885","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-37rx-7pj5-p885","identifiers":["GHSA-37rx-7pj5-p885"]},"retained":false,"historicalAffected":[]}],"coverage":[]}