CVE-2026-75048 Cross-site scripting in YouTrack

High 8.2 Published 17 Aug 2026 Updated 17 Aug 2026

Stored XSS in JetBrains YouTrack allows attackers to execute arbitrary scripts via fenced code-block language labels, potentially leading to session hijacking.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-75048?

CVE-2026-75048 is a high-severity cross-site scripting vulnerability in Jetbrains Youtrack, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In JetBrains YouTrack before 2026.2.18068 stored XSS via the fenced code-block language label was possible

Weakness: CWE-79

Which versions are affected by CVE-2026-75048?

It affects 1 product.

Products include Jetbrains Youtrack.

How do I fix CVE-2026-75048?

No fix has been published for CVE-2026-75048 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-75048 being exploited?

There is no known exploitation of CVE-2026-75048 in the wild and no public exploit code.

All Jetbrains Youtrack vulnerabilities

Sources

Also known as GHSA-whvx-752g-wvrx.