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Vulnerability record · CVE-2026-86478 · published 7 September 2026

CVE-2026-86478: Authentication bypass by spoofing vulnerability

In JetBrains YouTrack before 2025.3.161254, 2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address

9.8 CVSS 3.1 Critical EPSS 0.61% · top 53.1% CWE-290 · Authentication bypass by spoofing Deferred
9.8CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
9 Sep 2026Last modified by NVD

Description

In JetBrains YouTrack before 2025.3.161254, 2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://www.jetbrains.com/privacy-security/issues-fixed/

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-86478), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.