JetBrains TeamCity Vulnerabilities Prompt Canadian and Guyanese Update Advisories

The Canadian Centre for Cyber Security and Guyana National CIRT issued alerts about vulnerabilities affecting JetBrains TeamCity following a JetBrains security advisory dated October 6, 2026. Canada’s advisory, AV26-1012, was published on October 7, followed by Guyana’s notice on October 8. Both agencies urged users and administrators to review JetBrains’ security information and apply necessary updates.

The supplied affected-version information references TeamCity releases prior to 2026.2.1, but concatenated formatting prevents reliable interpretation of all version boundaries. The notices do not identify CVEs, severity ratings, technical impact, or exploitation status. Administrators should verify their installed versions against JetBrains’ authoritative fixed-security-issues information and apply the relevant updates rather than relying on the ambiguous version text.