{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"code.vikunja.io/api","cve_ids":["CVE-2026-91981"],"ecosystem":"Go","exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-vfxw-3x8p-2vjr","id":"tcs_01M5JJ4PSZTC98W2RHS42F0J1G","modified_at":"2026-10-19T21:31:52.823927246Z","published_at":"2026-10-19T21:08:26Z","references":["https://osv.dev/vulnerability/GO-2026-6752","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-vfxw-3x8p-2vjr","https://nvd.nist.gov/vuln/detail/CVE-2026-91981","https://github.com/go-vikunja/vikunja/pull/3688","https://github.com/go-vikunja/vikunja/releases/tag/v2.6.0","https://www.vulncheck.com/advisories/vikunja-before-2.6.0-user-enumeration-via-v2-api"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2026-6752","url":"https://osv.dev/vulnerability/GO-2026-6752"},{"source":"nvd","source_id":"CVE-2026-91981","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91981"}],"summary":"Vikunja: Link-share token can enumerate users through the v2 API in code.vikunja.io/api"}