{"id":"GHSA-37rx-7pj5-p885","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","summary":"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","severity":"high","cvss":7.5,"cwe":["CWE-200"],"vendor":"api","product":"code.vikunja.io/api","ecosystem":"go","affected":["code.vikunja.io/api <= 2.5.0"],"published":"2026-09-15","updated":"2026-10-09","sourceUpdated":"2026-10-09T20:51:23Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-37rx-7pj5-p885","references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qfwc-vx6f-3g6g"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91985"},{"url":"https://www.vulncheck.com/advisories/vikunja-before-2.6.0-privilege-escalation-via-link-share-hash"},{"url":"https://github.com/advisories/GHSA-37rx-7pj5-p885"}],"tags":["ghsa","go"],"ingestedAt":"2026-10-09T21:12:42.331Z","slug":"GHSA-37rx-7pj5-p885","body":"## Overview\n\n### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-qfwc-vx6f-3g6g.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.\n\n## Affected packages\n\n- `code.vikunja.io/api <= 2.5.0`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}