CVE-2026-86478

Unauthenticated Account Takeover via Self‑Asserted Email Authentication in YouTrack Helpdesk

Published Sep 7, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Unauthenticated Account Takeover via Self‑Asserted Email Authentication in YouTrack Helpdesk
Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains youtrack
Vendors & Products Jetbrains
Jetbrains youtrack
Type Values Removed Values Added
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
Weaknesses CWE-290
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
JetBrains
Published
Updated
Sep 9, 2026, 4:25 AM
Reserved
Sep 7, 2026, 4:13 PM
Status
Deferred
Published
Sep 7, 2026, 5:17 PM
Modified
Sep 9, 2026, 5:18 AM