{"affected":[{"defaultStatus":"unaffected","ecosystem":"golang","packageName":"code.vikunja.io/api","product":"vikunja","source":"CNA: VulnCheck","vendor":"go-vikunja","versions":[{"lessThan":"2.7.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.7.1","versionType":"semver"}]}],"cveId":"CVE-2026-123517","cwes":["CWE-204"],"description":"Vikunja before 2.7.1 contains an information disclosure vulnerability that allows authenticated users to determine whether private teams exist by calling the team member self-removal endpoint. Attackers can send DELETE requests to /teams/{id}/members/{own username} for arbitrary team ids and use the distinguishable responses to learn if a team exists, is SSO-managed, or has a single member.","epss":{"date":"2026-11-10","percentile":0.13022,"score":0.00223},"exploits":[],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":4.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},{"score":7.1,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":4.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1794333592297,"publishedAt":1794101848811,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v3r6-33v3-79c2"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vikunja-before-2.7.1-information-disclosure-via-team-self-removal-endpoint"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v3r6-33v3-79c2"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/vikunja-before-2.7.1-information-disclosure-via-team-self-removal-endpoint"}],"remediation":[],"revision":"c06c4c1ca664d08a8b838111ea9333e95d8a2fcff501f6b311b86322694c9f10","sources":[{"modifiedAt":1794333592297,"name":"CNA: VulnCheck","retrievedAt":1794334200297,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123517"},{"modifiedAt":1794104200850,"name":"NVD","retrievedAt":1794118560688,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123517"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794334238659,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123517"}],"ssvc":{"assessedAt":1794325299344,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Vikunja before 2.7.1 Information Disclosure via Team Self-Removal Endpoint","updatedAt":1794334238659}