CVE-2026-86497: CWE-201 in JetBrains YouTrack
Description
CVE-2026-86497 is a vulnerability in JetBrains YouTrack before version 2026.2.18769. It allows a project administrator to exfiltrate stored mailbox credentials by changing a mailbox host without re-authentication. The vulnerability has a medium severity with a CVSS score of 6.8.
CVSS v3.1
Score 6.8medium
Affected software
JetBrains
YouTrack
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-86497) in JetBrains YouTrack versions prior to 2026.2.18769 involves improper handling of mailbox host changes. Specifically, a project administrator can change the mailbox host without undergoing re-authentication, which enables exfiltration of stored mailbox credentials. The flaw is categorized under CWE-201 (Information Exposure Through Sent Data).
Potential Impact
An attacker with project administrator privileges can obtain mailbox credentials without re-authentication, leading to potential unauthorized access to mailbox data. The confidentiality of mailbox credentials is compromised, but there is no direct impact on integrity or availability.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18769. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:39.185Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9ee85bacd9273b49f0e440
Added to database: 09/07/2026, 16:37:47 UTC
Last enriched: 09/15/2026, 01:18:50 UTC
Last updated: 10/22/2026, 13:15:24 UTC
Views: 89
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