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\u201cAll versions of TeamCity On-Premises are affected. TeamCity Cloud customers are not required to take any action, as the necessary measures have already been applied,\u201d TeamCity solutions engineer Daniel Gallo said.<\/p>\n
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\u201cWe have verified that there is no evidence of TeamCity Cloud environments being exploited through this vulnerability.\u201d<\/p>\n
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A fix has been introduced in versions 2025.11.7 and 2026.1.3, while a security patch plug-in has also been released for versions 2017.1 and later. The patch, however, only addresses that specific vulnerability, and JetBrains recommends an upgrade to take advantage of other security updates.<\/p>\n
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Cyber security firm Rapid7 agrees with JetBrains\u2019 advice to make updating a priority.<\/p>\n
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\u201cOrganisations running TeamCity On-Premises should urgently prioritise updating to a fixed version, either via the TeamCity UI update workflow or by downloading and installing one of the following fixed versions,\u201d the company said in a 29 July blog post<\/a>.<\/p>\n
<\/p>\n \u201cIn addition to patching, as a defence-in-depth measure, Rapid7 recommends restricting network access to TeamCity servers to only users and systems that must have it.\u201d<\/p>\n
<\/p>\n The vulnerability was reported to JetBrains by security researcher Antoni Tremblay on 10 July.<\/p>\n![\"Cyber](\"https:\/\/www.newsbeep.com\/au\/wp-content\/uploads\/2026\/05\/google_preferred_source_badge_dark_2x_novto2.png\"){kind=icon}
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