CVE-2026-86478: CWE-290 in JetBrains YouTrack
CVE-2026-86478 is a critical authentication vulnerability in JetBrains YouTrack before versions 2025.3.161254 and 2026.1.14042. It allows unauthenticated attackers to take over accounts by exploiting improper authentication in the YouTrack Helpdesk component via a self-asserted email address.
AI Analysis
Technical Summary
This vulnerability (CWE-290) in JetBrains YouTrack affects versions prior to 2025.3.161254 and 2026.1.14042. It involves improper authentication in the YouTrack Helpdesk feature, enabling unauthenticated attackers to perform account takeover by self-asserting an email address. The CVSS v3.1 score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and full confidentiality, integrity, and availability impact.
Potential Impact
Successful exploitation allows an unauthenticated attacker to take over user accounts in YouTrack, potentially leading to full compromise of affected accounts and associated data. The vulnerability impacts confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
CVE-2026-86478: CWE-290 in JetBrains YouTrack
Description
CVE-2026-86478 is a critical authentication vulnerability in JetBrains YouTrack before versions 2025.3.161254 and 2026.1.14042. It allows unauthenticated attackers to take over accounts by exploiting improper authentication in the YouTrack Helpdesk component via a self-asserted email address.
CVSS v3.1
Score 9.8critical
Affected software
pkg:maven/com.jetbrains/youtrackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-290) in JetBrains YouTrack affects versions prior to 2025.3.161254 and 2026.1.14042. It involves improper authentication in the YouTrack Helpdesk feature, enabling unauthenticated attackers to perform account takeover by self-asserting an email address. The CVSS v3.1 score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and full confidentiality, integrity, and availability impact.
Potential Impact
Successful exploitation allows an unauthenticated attacker to take over user accounts in YouTrack, potentially leading to full compromise of affected accounts and associated data. The vulnerability impacts confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:33.299Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9ee857acd9273b49f0e3de
Added to database: 09/07/2026, 16:37:43 UTC
Last enriched: 09/07/2026, 17:07:12 UTC
Last updated: 09/07/2026, 22:19:59 UTC
Views: 25
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