{"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-2026-91973"],"ecosystem":"Go","exploited":false,"fixed_versions":["2.6.0"],"ghsa_id":"GHSA-m469-88xx-8rx2","id":"tcs_01M5JJN3P60C7RZPHMQKZ2KJ75","modified_at":"2026-10-19T21:40:52.604317649Z","published_at":"2026-10-09T20:52:04Z","references":["https://osv.dev/vulnerability/GHSA-m469-88xx-8rx2","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","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":"GHSA-m469-88xx-8rx2","url":"https://osv.dev/vulnerability/GHSA-m469-88xx-8rx2"},{"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"}