Incorrect authorization in TeamCity - CVE-2026-49376

 

Incorrect authorization in TeamCity - CVE-2026-49376

Published: August 17, 2026


Vulnerability identifier: #VU143828
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-49376
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to bypass authorization checks.

The vulnerability exists due to improper access control in the SAML plugin when validating usernames. A remote user can use a specially crafted username to bypass authorization checks.


Affected software

TeamCity

How to mitigate CVE-2026-49376

Install security update from vendor's website.

TeamCity - update to 2026.1

External References

Related Security Bulletins