CVE-2026-86491: CWE-79 in JetBrains YouTrack
A stored cross-site scripting (XSS) vulnerability exists in JetBrains YouTrack versions before 2026.2.18634. The vulnerability occurs via project and organization icon uploads, allowing malicious scripts to be stored and potentially executed in the context of users viewing these icons. The CVSS score is 3.5, indicating a low severity impact. No official patch or remediation information is currently available from the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-86491 is a stored XSS vulnerability (CWE-79) in JetBrains YouTrack affecting versions prior to 2026.2.18634. The flaw allows an attacker with high privileges and requiring user interaction to upload malicious content via project and organization icon uploads, which can then execute scripts in the context of other users. The vulnerability has a CVSS 3.1 base score of 3.5, reflecting low impact on confidentiality and integrity, and no impact on availability.
Potential Impact
The vulnerability could allow an attacker with high privileges to inject malicious scripts via icon uploads, potentially leading to limited confidentiality and integrity impacts when other users view the affected icons. There is no impact on availability. Exploitation requires user interaction and high privileges, limiting the overall risk. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict upload permissions to trusted users and monitor for suspicious icon uploads. Follow vendor updates for any forthcoming patches.
CVE-2026-86491: CWE-79 in JetBrains YouTrack
Description
A stored cross-site scripting (XSS) vulnerability exists in JetBrains YouTrack versions before 2026.2.18634. The vulnerability occurs via project and organization icon uploads, allowing malicious scripts to be stored and potentially executed in the context of users viewing these icons. The CVSS score is 3.5, indicating a low severity impact. No official patch or remediation information is currently available from the vendor. There are no known exploits in the wild at this time.
CVSS v3.1
Score 3.5low
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86491 is a stored XSS vulnerability (CWE-79) in JetBrains YouTrack affecting versions prior to 2026.2.18634. The flaw allows an attacker with high privileges and requiring user interaction to upload malicious content via project and organization icon uploads, which can then execute scripts in the context of other users. The vulnerability has a CVSS 3.1 base score of 3.5, reflecting low impact on confidentiality and integrity, and no impact on availability.
Potential Impact
The vulnerability could allow an attacker with high privileges to inject malicious scripts via icon uploads, potentially leading to limited confidentiality and integrity impacts when other users view the affected icons. There is no impact on availability. Exploitation requires user interaction and high privileges, limiting the overall risk. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict upload permissions to trusted users and monitor for suspicious icon uploads. Follow vendor updates for any forthcoming patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:37.226Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9ee859acd9273b49f0e418
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/07/2026, 16:54:15 UTC
Last updated: 09/08/2026, 01:52:29 UTC
Views: 10
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