CVE-2026-86497: CWE-201 in JetBrains YouTrack
A vulnerability in JetBrains YouTrack before version 2026.2.18769 allows a project administrator to exfiltrate stored mailbox credentials by changing a mailbox host without re-authentication. This issue is identified as CWE-201 (Information Exposure Through Sent Data). The vulnerability has a CVSS 3.1 score of 6.8, indicating a medium severity level. No official patch or remediation guidance has been provided yet, and there are no known exploits in the wild.
AI Analysis
Technical Summary
CVE-2026-86497 is an information exposure vulnerability in JetBrains YouTrack versions prior to 2026.2.18769. It occurs because changing a mailbox host does not require re-authentication, allowing a project administrator to access and exfiltrate stored mailbox credentials. This flaw is categorized under CWE-201. The vulnerability has a CVSS 3.1 base score of 6.8 with network attack vector, low attack complexity, high privileges required, no user interaction, and a scope change. Confidentiality impact is high, while integrity and availability impacts are none.
Potential Impact
An attacker with project administrator privileges can exfiltrate stored mailbox credentials by changing the mailbox host without needing to re-authenticate. This leads to a high confidentiality impact, potentially exposing sensitive mailbox credentials. There is no impact on integrity or availability. The vulnerability requires high privileges and can be exploited remotely over the network without user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict project administrator privileges to trusted users only and monitor for suspicious mailbox configuration changes.
CVE-2026-86497: CWE-201 in JetBrains YouTrack
Description
A vulnerability in JetBrains YouTrack before version 2026.2.18769 allows a project administrator to exfiltrate stored mailbox credentials by changing a mailbox host without re-authentication. This issue is identified as CWE-201 (Information Exposure Through Sent Data). The vulnerability has a CVSS 3.1 score of 6.8, indicating a medium severity level. No official patch or remediation guidance has been provided yet, and there are no known exploits in the wild.
CVSS v3.1
Score 6.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86497 is an information exposure vulnerability in JetBrains YouTrack versions prior to 2026.2.18769. It occurs because changing a mailbox host does not require re-authentication, allowing a project administrator to access and exfiltrate stored mailbox credentials. This flaw is categorized under CWE-201. The vulnerability has a CVSS 3.1 base score of 6.8 with network attack vector, low attack complexity, high privileges required, no user interaction, and a scope change. Confidentiality impact is high, while integrity and availability impacts are none.
Potential Impact
An attacker with project administrator privileges can exfiltrate stored mailbox credentials by changing the mailbox host without needing to re-authenticate. This leads to a high confidentiality impact, potentially exposing sensitive mailbox credentials. There is no impact on integrity or availability. The vulnerability requires high privileges and can be exploited remotely over the network without user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict project administrator privileges to trusted users only and monitor for suspicious mailbox configuration changes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:39.185Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9ee85bacd9273b49f0e440
Added to database: 09/07/2026, 16:37:47 UTC
Last enriched: 09/07/2026, 16:53:50 UTC
Last updated: 09/07/2026, 22:34:25 UTC
Views: 9
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