CVE-2026-49381 Cross-site scripting in TeamCity
Stored XSS in the SAML login page allows attackers to execute scripts in victim browsers, potentially leading to session hijacking or data theft.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-49381?
CVE-2026-49381 is a low-severity cross-site scripting vulnerability in Jetbrains Teamcity, published on 29 May 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
In JetBrains TeamCity before 2026.1 stored XSS on the SAML login page was possible
Weakness: CWE-79
Which versions are affected by CVE-2026-49381?
It affects 1 product.
Products include Jetbrains Teamcity.
How do I fix CVE-2026-49381?
No fix has been published for CVE-2026-49381 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-2026-49381 being exploited?
There is no known exploitation of CVE-2026-49381 in the wild and no public exploit code.
Other vulnerabilities in Jetbrains Teamcity
Sources
Also known as GHSA-mhr7-j6qx-58mw.