CVE-2026-100262: CWE-863 in JetBrains YouTrack
CVE-2026-100262 is a high-severity vulnerability in JetBrains YouTrack before version 2026.2.18991. It involves missing authorization checks that allow users with read-only project access to overwrite project notification templates. This could lead to unauthorized modification of notification settings within the affected projects.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-100262 in JetBrains YouTrack is classified under CWE-863 (Incorrect Authorization). It affects versions prior to 2026.2.18991 and allows users who have only read-only access to a project to overwrite the project's notification templates. This represents a failure in enforcing proper authorization controls on sensitive project configuration elements.
Potential Impact
An attacker with read-only access to a project can modify notification templates, potentially disrupting notification workflows or causing unauthorized information disclosure or manipulation through altered notifications. The CVSS 3.1 score of 7.6 reflects a high severity with low attack complexity and no user interaction required, indicating a significant risk if exploited.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18991. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-100262: CWE-863 in JetBrains YouTrack
Description
CVE-2026-100262 is a high-severity vulnerability in JetBrains YouTrack before version 2026.2.18991. It involves missing authorization checks that allow users with read-only project access to overwrite project notification templates. This could lead to unauthorized modification of notification settings within the affected projects.
CVSS v3.1
Score 7.6high
Affected software
JetBrains
YouTrack
pkg:maven/com.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
The vulnerability identified as CVE-2026-100262 in JetBrains YouTrack is classified under CWE-863 (Incorrect Authorization). It affects versions prior to 2026.2.18991 and allows users who have only read-only access to a project to overwrite the project's notification templates. This represents a failure in enforcing proper authorization controls on sensitive project configuration elements.
Potential Impact
An attacker with read-only access to a project can modify notification templates, potentially disrupting notification workflows or causing unauthorized information disclosure or manipulation through altered notifications. The CVSS 3.1 score of 7.6 reflects a high severity with low attack complexity and no user interaction required, indicating a significant risk if exploited.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18991. 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
- 2026-09-25T17:02:05.517Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd2c302a4e24523d2ec2f8
Added to database: 09/30/2026, 15:35:12 UTC
Last enriched: 09/30/2026, 15:48:40 UTC
Last updated: 10/01/2026, 03:42:30 UTC
Views: 12
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