CVE-2026-100262
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Unauthorized Template Overwrite in JetBrains YouTrack

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: JetBrains s.r.o.

Description
In JetBrains YouTrack before 2026.2.18991 missing authorisation allowed users with read-only project access to overwrite project notification templates

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-100262
EUVD
EUVD-2026-90006

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.18991 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

This vulnerability in JetBrains YouTrack before version 2026.2.18991 allows users with read-only project access to overwrite project notification templates. This occurs due to missing authorization checks, enabling unauthorized modifications to notification settings.

Impact Analysis

An attacker with read-only access could alter notification templates to send misleading or malicious notifications to users. This may lead to misinformation, phishing attempts, or disruption of project communication workflows.

Compliance Impact

This vulnerability could impact compliance by allowing unauthorized changes to notification content, potentially exposing sensitive data or violating data integrity requirements under GDPR or HIPAA. Notification tampering may lead to unauthorized disclosures or breaches of confidentiality.

Mitigation Strategies

Update JetBrains YouTrack to version 2026.2.18991 or later to address the missing authorization issue in project notification templates.

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