{"action":"Upgrade code.vikunja.io/api to 2.6.0 or later.","affected":[{"fixed":"2.6.0","introduced":"0"}],"component":"code.vikunja.io/api","cve_ids":["CVE-2026-91981"],"ecosystem":"Go","exploited":false,"fixed_versions":["2.6.0"],"ghsa_id":"GHSA-vfxw-3x8p-2vjr","id":"tcs_01M5JJN73NTQWBPHSTE27P4RAR","modified_at":"2026-10-19T21:40:54.809992875Z","published_at":"2026-10-09T20:52:39Z","references":["https://osv.dev/vulnerability/GHSA-vfxw-3x8p-2vjr","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","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":"GHSA-vfxw-3x8p-2vjr","url":"https://osv.dev/vulnerability/GHSA-vfxw-3x8p-2vjr"},{"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"}