CVE-2026-86483: CWE-79 in JetBrains YouTrack
A stored cross-site scripting (XSS) vulnerability exists in JetBrains YouTrack before version 2026.2.18634. The issue arises via a custom field on Agile board cards, allowing malicious scripts to be stored and potentially executed in users' browsers. This vulnerability has a medium severity rating with a CVSS score of 5.4.
AI Analysis
Technical Summary
CVE-2026-86483 is a stored XSS vulnerability (CWE-79) in JetBrains YouTrack affecting versions before 2026.2.18634. The vulnerability allows an attacker with limited privileges to inject malicious scripts through a custom field on Agile board cards. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with impact on confidentiality and integrity but no impact on availability.
Potential Impact
Successful exploitation could lead to the execution of arbitrary scripts in the context of the victim's browser, potentially exposing sensitive information or enabling actions on behalf of the user. The impact is limited to confidentiality and integrity with no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data. Users should monitor JetBrains advisories for updates and consider restricting privileges or user input where possible until a fix is available.
CVE-2026-86483: CWE-79 in JetBrains YouTrack
Description
A stored cross-site scripting (XSS) vulnerability exists in JetBrains YouTrack before version 2026.2.18634. The issue arises via a custom field on Agile board cards, allowing malicious scripts to be stored and potentially executed in users' browsers. This vulnerability has a medium severity rating with a CVSS score of 5.4.
CVSS v3.1
Score 5.4medium
Affected software
pkg:github/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
CVE-2026-86483 is a stored XSS vulnerability (CWE-79) in JetBrains YouTrack affecting versions before 2026.2.18634. The vulnerability allows an attacker with limited privileges to inject malicious scripts through a custom field on Agile board cards. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with impact on confidentiality and integrity but no impact on availability.
Potential Impact
Successful exploitation could lead to the execution of arbitrary scripts in the context of the victim's browser, potentially exposing sensitive information or enabling actions on behalf of the user. The impact is limited to confidentiality and integrity with no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data. Users should monitor JetBrains advisories for updates and consider restricting privileges or user input where possible until a fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:35.041Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9ee857acd9273b49f0e3e8
Added to database: 09/07/2026, 16:37:43 UTC
Last enriched: 09/07/2026, 17:08:23 UTC
Last updated: 09/08/2026, 00:19:58 UTC
Views: 7
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