Cross-site scripting in TeamCity - CVE-2026-49375
Published: August 17, 2026
Vulnerability identifier: #VU143818
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-49375
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script in the victim's browser.
The vulnerability exists due to cross-site scripting in the repository download page when handling crafted input in web requests. A remote attacker can send a specially crafted request to execute arbitrary script in the victim's browser.
Affected software
TeamCity
How to mitigate CVE-2026-49375
Install security update from vendor's website.
TeamCity - addressed in versions 2025.11.5, 2026.1