{"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-2026-91971"],"ecosystem":"Go","exploited":false,"fixed_versions":["2.6.0"],"ghsa_id":"GHSA-4vh2-39rq-rq8j","id":"tcs_01M5JJPH76N4GWQ3N65M4C8J2A","modified_at":"2026-10-19T21:41:15.904955453Z","published_at":"2026-10-09T20:52:15Z","references":["https://osv.dev/vulnerability/GHSA-4vh2-39rq-rq8j","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-4vh2-39rq-rq8j","https://nvd.nist.gov/vuln/detail/CVE-2026-91971","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-denial-of-service-via-avatar-upload"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-4vh2-39rq-rq8j","url":"https://osv.dev/vulnerability/GHSA-4vh2-39rq-rq8j"},{"source":"nvd","source_id":"CVE-2026-91971","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91971"}],"summary":"Vikunja: Unbounded image decode on avatar and project-background uploads enables decode/resize amplification"}