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CVE-2026-86478: CWE-290 in JetBrains YouTrack

0
Critical
VulnerabilityCVE-2026-86478cvecve-2026-86478cwe-290
Published: 09/07/2026 (09/07/2026, 16:26:40 UTC)
Source: CVE Database V5
Vendor/Project: JetBrains
Product: YouTrack

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 v3.1

Score 9.8critical

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

JetBrains

YouTrack

Affected versions
=0
Mavenmore threats →ai
com.jetbrains/youtrack
pkg:maven/com.jetbrains/youtrack
Affected versions
<2025.3.161254<2026.1.14042

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 09/15/2026, 00:45:29 UTC

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 asserting control over an email address without proper verification. The CVSS 3.1 base score is 9.8, indicating critical severity with network attack vector, no privileges required, no user interaction, and full confidentiality, integrity, and availability impact.

Potential Impact

Successful exploitation allows unauthenticated attackers to take over user accounts in YouTrack, potentially leading to full compromise of user data and system integrity. The vulnerability impacts confidentiality, integrity, and availability of the affected system.

Mitigation Recommendations

A fix is available in JetBrains YouTrack versions 2025.3.161254 and 2026.1.14042 and later. Users should upgrade to these or later versions to remediate the vulnerability. No vendor advisory content was provided to indicate otherwise.

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Technical Details

Data Version
5.2
Assigner Short Name
JetBrains
Date Reserved
2026-09-07T16:13:33.299Z
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6a9ee857acd9273b49f0e3de

Added to database: 09/07/2026, 16:37:43 UTC

Last enriched: 09/15/2026, 00:45:29 UTC

Last updated: 10/22/2026, 13:15:24 UTC

Views: 158

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