CVE-2026-86490: CWE-863 in JetBrains YouTrack
Description
CVE-2026-86490 is a medium severity vulnerability in JetBrains YouTrack before version 2026.2.18634. It involves improper permission checks that allow an attacker with limited privileges to overwrite bundled applications via the app import endpoint. This could lead to unauthorized modification of application components without user interaction.
CVSS v3.1
Score 6.5medium
Affected software
JetBrains
YouTrack
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-863) in JetBrains YouTrack versions prior to 2026.2.18634 arises from improper permission checks on the app import endpoint. An attacker with limited privileges can exploit this flaw to overwrite bundled apps, potentially altering application behavior or functionality. The CVSS 3.1 score of 6.5 reflects a network attack vector with low attack complexity, requiring privileges but no user interaction, and impacts integrity without affecting confidentiality or availability.
Potential Impact
The vulnerability allows an attacker with some level of privileges to overwrite bundled applications in YouTrack, compromising the integrity of the software. This could enable unauthorized changes to application components, potentially leading to further exploitation or disruption of normal operations. There is no indication of confidentiality or availability impact.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18634. Users should upgrade to this version or later to remediate the vulnerability. Since this is not a cloud service, manual patching by the user is required. Patch status is confirmed by the version information provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:36.999Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9ee859acd9273b49f0e416
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/15/2026, 01:18:11 UTC
Last updated: 10/21/2026, 13:22:14 UTC
Views: 72
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