{"id":"CVE-2026-86478","title":"In JetBrains YouTrack before 2025.3.161254, \n2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address","summary":"In JetBrains YouTrack before 2025.3.161254, \n2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-290"],"vendor":"JetBrains","product":"YouTrack","affected":["YouTrack < 2025.3.161254, \n2026.1.14042"],"published":"2026-09-07","updated":"2026-09-09","sourceUpdated":"2026-09-09T05:18:19.617","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86478","references":[{"url":"https://www.jetbrains.com/privacy-security/issues-fixed/","label":"cve@jetbrains.com"}],"tags":["nvd","cve.org","exploit-available"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-08T10:16:36.481011Z"},"epss":0.00606,"epssPercentile":0.48777,"ingestedAt":"2026-09-08T15:33:26.979Z","exploits":{"github":1,"githubRepos":["https://github.com/LHeiakim/CVE-2026-86478-PoC"],"checkedAt":"2026-10-27T19:18:53.142Z"},"exploitAvailable":true,"slug":"CVE-2026-86478","body":"## Overview\n\nIn JetBrains YouTrack before 2025.3.161254, \n2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":227670,"id":"CVE-2026-86478","ts":1792700232903,"field":"exploit_available","old":"false","new":"true"}]}