What is CVE-2026-59791?

CVE-2026-59791 is a low-severity vulnerability in Jetbrains Youtrack, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 3.5/10. Published 2026-07-10.

How severe is CVE-2026-59791?

Low severity. CVSS v3 base score is 3.5 out of 10.

Vulnerability in Jetbrains Youtrack

CVE-2026-59791

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

Published 2026-07-10 · last modified 2026-07-10.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.9th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Jetbrains Youtrack — versions 0

Weakness classification (CWE)

CWE-1021 — Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

References

www.jetbrains.com/privacy-security/issues-fixed/ (Vendor Advisory)

Frequently asked questions

What is CVE-2026-59791?: CVE-2026-59791 is a low-severity vulnerability in Jetbrains Youtrack, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 3.5/10. Published 2026-07-10.
How severe is CVE-2026-59791?: Low severity. CVSS v3 base score is 3.5 out of 10.