Insufficient Username Validation in JetBrains TeamCity SAML Plugin

Publication date: 2026-05-29

Last updated on: 2026-06-02

Assigner: JetBrains s.r.o.

Description

In JetBrains TeamCity before 2026.1 insufficient username validation in the SAML plugin

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-29

Last Modified

2026-06-02

Generated

2026-07-09

AI Q&A

2026-05-29

EPSS Evaluated

2026-07-08

NVD

CVE-2026-49376

EUVD

EUVD-2026-33384

Affected Vendors & Products

Vendor	Product	Version / Range
jetbrains	teamcity	to 2026.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability exists in JetBrains TeamCity versions before 2026.1 and is caused by insufficient username validation in the SAML plugin.

Impact Analysis

The vulnerability has a CVSS v3.1 base score of 6.5, indicating a medium severity. It allows an attacker to potentially impact confidentiality and integrity, but not availability. Because it involves insufficient username validation in the SAML plugin, it could lead to unauthorized access or impersonation within the affected system.

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