Cyber Resilience

CVE-2026-59791

Jetbrains Youtrack ≤ 2026.2.17012

Published
10 July 2026
Modified
10 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 3.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
EPSS Score 0.0014 3th percentile
Risk Priority 29 floored blend · peak EPSS

Summary

CVE-2026-59791 is a low-severity Improper Restriction of Rendered UI Layers or Frames (CWE-1021) vulnerability in Jetbrains Youtrack. Its CVSS base score is 3.5 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Drive-by Compromise (T1189); ranked at the 3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability Data

In JetBrains YouTrack before 2026.2.17012 cSS injection via Mermaid diagram rendering was possible

CWE(s)
CWE-1021

Related Threats

MITRE ATT&CK Enterprise Techniques

T1189 Drive-by Compromise Initial Access
Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.
attack.mitre.org →
T1056 Input Capture Collection
Adversaries may use methods of capturing user input to obtain credentials or collect information.
attack.mitre.org →
T1557 Adversary-in-the-Middle Credential Access
Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support follow-on behaviors such as [Network Sniffing](https://attack.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-54527Same product: Jetbrains Youtrack
CVE-2026-49370Same product: Jetbrains Youtrack
CVE-2024-35299Same product: Jetbrains Youtrack
CVE-2024-49579Same product: Jetbrains Youtrack
CVE-2025-64685Same product: Jetbrains Youtrack
CVE-2024-50581Same product: Jetbrains Youtrack
CVE-2023-35054Same product: Jetbrains Youtrack
CVE-2024-50578Same product: Jetbrains Youtrack
CVE-2024-50577Same product: Jetbrains Youtrack
CVE-2024-50579Same product: Jetbrains Youtrack

Affected Assets

jetbrains
youtrack
≤ 2026.2.17012

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require implementing frame-ancestors / X-Frame-Options controls that prevent this weakness.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect missing frame protections, but does not itself implement the control.

A.8.23 Web filtering partial match
degrades

Web filtering can block or sandbox untrusted frames, but does not enforce application-level frame-busting or CSP.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate frame-ancestors / X-Frame-Options, directly addressing UI redressing risks.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles include isolation of UI layers and proper use of browser security controls.

A.8.28 Secure coding partial match
prevents

Secure coding practices directly require implementation of frame-busting headers or CSP frame-ancestors directives.

References