CVE-2026-100279

Jetbrains Youtrack: server-side request forgery

Risk score: 42/100
CVSS: 6.5 v3.1
Exploit chance (30 days): 0.2%
Published: 30 Sep 2026

Open in the live forecast Today's forecast

What to know

What it is: In JetBrains YouTrack before 2026.2.19197 changing an integration URL exposed its stored credentials
Affected: Jetbrains Youtrack before 2026.2.19197
Fix: Upgrade Jetbrains Youtrack to 2026.2.19197 or later.
Exploitation: No known exploitation

Story map

Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Jetbrains Youtrack: Amber, patch this week. In JetBrains YouTrack before 2026.2.19197 authorisation bypass in the scripts debugger allowed arbitrary code execution

The flaws

CVE-2026-100279: Server-side request forgery (CVSS 6.5 · EPSS 0%)
CVE-2026-100273: Incorrect authorisation can lead to remote code execution (CVSS 9.8 · EPSS 0%)
CVE-2026-100277: Incorrect authorisation (CVSS 9.8 · EPSS 0%)
CVE-2026-103493: Cross-site scripting (CVSS 8.1 · EPSS 0%)

The fix

Upgrade Jetbrains Youtrack: 2026.2.19197 · 2026.2.19422 or later on your release line

Who is exposed: Jetbrains Youtrack before 2026.2.19197

Where it stands

No known exploitation

Connects to

Same weakness: Server-side request forgery (CWE-918). 220 other warnings in 30 days
Same product: Earlier Jetbrains Youtrack warnings. 28 in the last 90 days

Why it is Yellow

CVSS 6.5 medium

References

https://www.jetbrains.com/privacy-security/issues-fixed/

Original description

In JetBrains YouTrack before 2026.2.19197 changing an integration URL exposed its stored credentials

Last activity 30 Sep 2026. Patch Forecast updates every hour.