Bug 2568383 (CVE-2026-116248)

Summary: CVE-2026-116248 pgadmin4: pgadmin4: Credential disclosure via unauthorized server sharing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in pgadmin4. In server mode, an authenticated non-administrative user can share database server configurations with all other users due to improper authorization checks in the server management API and file import routines. This flaw allows an attacker to plant a malicious server pointing to a system under their control, leading to the disclosure of database credentials when other users attempt to connect.
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Bug Depends On: 2568981    
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Description OSIDB Bzimport 2026-11-06 16:32:36 UTC 
In pgAdmin 4 server mode only administrators are meant to share a server with all users; the server dialog shows the Shared switch only to them. The create and update endpoints of the server API, however, stored the "shared" flag and shared username they were sent, so any user able to register a server could share one with every other user. The servers.json import had a similar gap: a non-administrator's "Shared" entries were removed only after validation, so a file that also held an invalid entry could create a shared server.

A shared server carries no credentials, so this gives no direct access. It lets a user plant a server, named to look trusted, in every other user's tree and pointing at a host the user controls; anyone who then connects to it presents their own database password to that host.

The fix refuses a non-administrator's request that would share a server with HTTP 403, prunes a non-administrator's shared entries from a servers.json import before validating it, and warns at startup about servers shared earlier by non-administrators.

This issue affects pgAdmin 4: before 9.19.