CVE-2026-57926
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Prototype Pollution in JetBrains YouTrack

Publication date: 2026-06-26

Last updated on: 2026-06-26

Assigner: JetBrains s.r.o.

Description
In JetBrains YouTrack before 2026.2.16593 the websandbox bridge was vulnerable to a prototype pollution attack
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Meta Information
Published
2026-06-26
Last Modified
2026-06-26
Generated
2026-06-26
AI Q&A
2026-06-26
EPSS Evaluated
N/A
NVD
CVE-2026-57926
EUVD
EUVD-2026-39658
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.16593 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-1321 The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
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Executive Summary

This vulnerability exists in JetBrains YouTrack versions before 2026.2.16593 and involves the websandbox bridge being susceptible to a prototype pollution attack.

Impact Analysis

The vulnerability has a low CVSS base score of 2.6, indicating limited impact. It requires network access with high attack complexity, low privileges, and user interaction. The impact is limited to integrity loss without affecting confidentiality or availability.

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