SB20260817112 - Multiple vulnerabilities in TeamCity

Description

This security bulletin contains information about 3 vulnerabilities.

1) Relative Path Traversal (CVE-ID: CVE-2025-59456)

CWE-ID: CWE-23 - Relative Path Traversal

CVSSv4: 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]

The vulnerability allows a remote user to access files outside the intended upload directory.

The vulnerability exists due to path traversal in project archive upload when processing uploaded project archives. A remote user can upload a specially crafted archive containing traversal sequences to access files outside the intended upload directory.

2) Race condition (CVE-ID: CVE-2025-59455)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to bypass project isolation.

The vulnerability exists due to a race condition in project isolation controls when handling concurrent operations. A remote user can trigger concurrent actions to bypass project isolation.

3) Permissive List of Allowed Inputs (CVE-ID: CVE-2025-59457)

CWE-ID: CWE-183 - Permissive List of Allowed Inputs

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to incorrect behavior order in git URL validation in TeamCity on Windows when processing user-supplied Git URLs. A remote user can supply a crafted Git URL to disclose sensitive information.

Only Windows installations are vulnerable.

Remediation

Install update from vendor's website.

References

• https://www.jetbrains.com/privacy-security/issues-fixed/#2ca75b50a1701cd9f32d259793724b28
• https://www.jetbrains.com/privacy-security/issues-fixed/#44b1885fbeeb4262db520f3de50c8c45
• https://www.jetbrains.com/privacy-security/issues-fixed/#454be6ff57b2dfca771f8bfd9aad943b