CVE-2026-100257
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Stored XSS via PDF Export 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 sSRF via stored XHTML injection was possible during PDF export

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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-2026-100257
EUVD
EUVD-2026-90001

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-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

This vulnerability in JetBrains YouTrack before version 2026.2.18991 allows server-side request forgery (SSRF) through stored XHTML injection during PDF export. An attacker could exploit this to make unauthorized requests from the server.

Impact Analysis

An attacker could use this to access internal systems, exfiltrate data, or perform actions on behalf of the server. Users with access to YouTrack could be affected if the system is compromised.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Update JetBrains YouTrack to version 2026.2.18991 or later to address the stored XHTML injection vulnerability during PDF export.

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