CVE-2026-59795 Cross-site scripting in TeamCity
An attacker can execute arbitrary scripts in the TeamCity web interface via unauthenticated agent registration, potentially compromising user accounts.
- 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-2026-59795?
CVE-2026-59795 is a high-severity cross-site scripting vulnerability in Jetbrains Teamcity, published on 10 Jul 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 TeamCity before 2026.1.2 stored XSS via unauthenticated agent registration was possible
Weakness: CWE-79
Which versions are affected by CVE-2026-59795?
It affects 1 product.
Products include Jetbrains Teamcity.
How do I fix CVE-2026-59795?
No fix has been published for CVE-2026-59795 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-2026-59795 being exploited?
There is no known exploitation of CVE-2026-59795 in the wild and no public exploit code.
Other vulnerabilities in Jetbrains Teamcity
Sources
Also known as GHSA-ch3x-q6cp-54rw.