SAML Plugin Insufficient Username Validation in JetBrains TeamCity
CVE-2026-49376

6.5MEDIUM

Key Information:

Vendor

Jetbrains
Status
Teamcity
Vendor
CVE Published:
29 May 2026

What is CVE-2026-49376?

The JetBrains TeamCity platform, specifically the SAML authentication plugin, has a security flaw where it fails to properly validate usernames. This vulnerability could potentially allow unauthorized users to gain access to sensitive functions and data within TeamCity, leading to unauthorized actions or information exposure. Users are advised to apply the latest updates to ensure robust security and to prevent exploitation of this issue.

Affected Version(s)

TeamCity 0 < 2026.1

References

https://www.jetbrains.com/privacy-security/issues-fixed/

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.