CVE-2026-59796 is a vulnerability in JetBrains TeamCity that affects versions prior to 2026.1.2. It arises from improper permission checks (CWE-862), enabling unauthorized users with limited privileges to modify build pipelines. The vulnerability impacts confidentiality and integrity with no reported availability impact. The CVSS 3.1 vector indicates network attack vector, low attack complexity, required privileges, no user interaction, and unchanged scope. No vendor advisory or patch information is currently available, and the product is not a cloud service, so remediation depends on vendor updates.

Successful exploitation allows an attacker with limited privileges to modify build pipelines, potentially leading to unauthorized changes in build processes and exposure or alteration of sensitive build configurations. This compromises confidentiality and integrity of the build environment. There is no indication of availability impact. No known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict user privileges to trusted personnel only and monitor for unauthorized pipeline changes. Follow JetBrains' official communications for updates on patches or workarounds.