{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"code.vikunja.io/api","cve_ids":["CVE-2026-91973"],"ecosystem":"Go","exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-m469-88xx-8rx2","id":"tcs_01M5JJ31RRB9G181MW2R1H6Q8X","modified_at":"2026-10-19T21:31:35.964761967Z","published_at":"2026-10-19T21:08:26Z","references":["https://osv.dev/vulnerability/GO-2026-6737","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-m469-88xx-8rx2","https://nvd.nist.gov/vuln/detail/CVE-2026-91973","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-authentication-bypass-via-caldav-basicauth"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GO-2026-6737","url":"https://osv.dev/vulnerability/GO-2026-6737"},{"source":"nvd","source_id":"CVE-2026-91973","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91973"}],"summary":"Vikunja: CalDAV and feeds BasicAuth endpoints have no rate limit, bypassing the anti-brute-force floor on account passwords in code.vikunja.io/api"}