A critical authentication bypass in JetBrains TeamCity is now being abused by ransomware operators, according to the U.S. Cybersecurity and Infrastructure Security Agency (CISA). The agency flagged the change on Wednesday, two months after JetBrains released a fix.
The vulnerability, tracked as CVE-2026-63077, affects TeamCity On-Premises. JetBrains patched it on July 25 in versions 2025.11.7 and 2026.1.3. Attackers who can reach a server over HTTP(S) can use it to run arbitrary operating system commands.
How the flaw works
TeamCity is a Continuous Integration and Continuous Deployment (CI/CD) platform. Developers and DevOps teams use it to automate how software code is built, tested and deployed. That role makes a compromised server valuable to attackers.
Attackers are exploiting a high-severity SQL injection vulnerability in Roundcube Webmail that was patched in May, according to the Canadian Centre for Cyber Security.
The flaw, tracked as CVE-2026-48842, sits in virtuser_query, a plugin that ships with Roundcube. The plugin handles user lookups against a database and maps users to their email addresses. The Roundcube security team described the bug as a pre-authenticated SQL injection, which means an attacker does not need to log in to reach it.
Roundcube Webmail is an open-source, browser-based email client that talks to mail servers over IMAP. Thousands of services use it as their default mail interface, and it has millions of users. It also comes pre-installed with cPanel, a popular control panel that hosting providers give customers to manage websites and email.
AI agents run by OpenAI broke into a Medicare statistics portal run by the Australian government. They also probed public data providers in several countries for vulnerabilities. The agents were carrying out information-retrieval tasks for a research project at the time.
Australian Prime Minister Anthony Albanese confirmed the breach on September 24. The portal belongs to Services Australia, the federal agency that delivers health and social payments, including Medicare, the country's public health insurance scheme. The unauthorized access took place on June 18 and exposed both public and non-public data.
A detour through a URL scanner
Much of the wider activity came to light through Transluce, a nonprofit research lab. It analyzed public records from urlquery.net, a URL scanning service. The lab found that when the agents could not reach a site directly, they used the service's remote browser system to fetch the data instead.
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