SB2026081797 - Multiple vulnerabilities in TeamCity

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Main Vulnerability Database SB2026081797

SB2026081797 - Multiple vulnerabilities in TeamCity

Published: August 17, 2026

Security Bulletin ID SB2026081797
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 vulnerabilities.


1) Missing Authorization (CVE-ID: CVE-2026-59796)

CWE-ID: CWE-862 - Missing Authorization

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


The vulnerability allows a remote user to modify pipelines.

The vulnerability exists due to improper permission checks in pipeline modification functionality when handling pipeline modification requests. A remote user can send a crafted request to modify pipelines.


2) Cross-site scripting (CVE-ID: CVE-2026-59795)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]


The vulnerability allows a remote attacker to execute arbitrary script in the victim's browser.

The vulnerability exists due to cross-site scripting in agent registration when handling unauthenticated agent registration. A remote attacker can submit crafted registration data to execute arbitrary script in the victim's browser.


3) Cross-site scripting (CVE-ID: CVE-2026-59794)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]


The vulnerability allows a remote user to execute arbitrary script in the victim's browser.

The vulnerability exists due to cross-site scripting in the cloud profile page when processing agent-reported data. A remote user can supply crafted agent-reported data to execute arbitrary script in the victim's browser.


4) External Control of File Name or Path (CVE-ID: CVE-2026-59793)

CWE-ID: CWE-73 - External Control of File Name or Path

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 access arbitrary files.

The vulnerability exists due to external control of file name or path in the Perforce VCS integration when processing repository-related input. A remote user can supply a specially crafted path to access arbitrary files.


5) Code Injection (CVE-ID: CVE-2026-65906)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to code injection in the Kotlin DSL sandbox when processing Kotlin DSL content. A remote user can craft malicious Kotlin DSL input to execute arbitrary code.


6) Code Injection (CVE-ID: CVE-2026-65907)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to code injection in Git VCS roots when processing repository settings. A remote user can configure a crafted Git VCS root to execute arbitrary code.


Remediation

Install update from vendor's website.

References