SB2026022546 - Multiple vulnerabilities in JetBrains TeamCity

Description

This security bulletin contains information about 3 vulnerabilities.

1) Missing Authorization (CVE-ID: CVE-2026-28195)

CWE-ID: CWE-862 - Missing Authorization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to gain unauthorized access to the application.

The vulnerability exists due to missing authorization checks. A remote user with project developer permissions can add parameters to build configurations.

2) Incomplete cleanup (CVE-ID: CVE-2026-28196)

CWE-ID: CWE-459 - Incomplete cleanup

CVSSv4: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to incomplete cleanup where a config file with credentials is left on disk. A local user can gain access to sensitive information. 

3) Open redirect (CVE-ID: CVE-2026-28194)

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data in the React project creation flow. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Remediation

Install update from vendor's website.

References

• https://www.jetbrains.com/privacy-security/issues-fixed/#fb8bbeb4d7bb6f754976598e6770e38d
• https://www.jetbrains.com/privacy-security/issues-fixed/#83239d6821108cedb52f15df3e44edd9
• https://www.jetbrains.com/privacy-security/issues-fixed/#c4ceeb2407b26c766b91123540c3231d