pgAdmin 4 Database Management Tool Patches Multiple Vulnerabilities in Version 9.18
The development team for the PostgreSQL management tool pgAdmin 4 has released version 9.18 to address multiple vulnerabilities. The security update was published on September 17, 2026, and resolves four CVEs while delivering 29 total changes that also include new features and bug fixes.
One of the corrected issues, CVE-2026-86863, arises from improper web server authentication. The application trusts HTTP headers supplied by external sources, which can allow authentication bypass when user information cannot be retrieved from the web server. Attackers can supply an arbitrary username and gain administrative privileges without providing a password.
A second vulnerability, CVE-2026-86864, affects the backup functionality. Database names are processed as command-line arguments, creating a command injection risk. Although exploitation requires authentication, successful attacks can write files outside the intended storage area or redirect connections to exfiltrate database credentials to attacker-controlled systems.
Users are strongly encouraged to upgrade to pgAdmin 4 9.18 immediately. The updated release is available through the official GitHub repository maintained by the pgadmin-org project.
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