CVE-2026-86483 Cross-site scripting in YouTrack
Stored XSS in JetBrains YouTrack allows attackers to execute scripts via custom fields on Agile board cards, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-86483?
CVE-2026-86483 is a medium-severity cross-site scripting vulnerability in JetBrains YouTrack, published on 7 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
In JetBrains YouTrack before 2026.2.18634 stored XSS via a custom field on Agile board cards was possible
Weakness: CWE-79
Which versions are affected by CVE-2026-86483?
How do I fix CVE-2026-86483?
No fix has been published for CVE-2026-86483 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-2026-86483 being exploited?
There is no known exploitation of CVE-2026-86483 in the wild and no public exploit code.
Sources
Also known as GHSA-8ghm-r78p-92fx.