Bug 2568369 (CVE-2026-116245)

Summary: CVE-2026-116245 pgadmin4: pgAdmin 4: Unauthorized database access via service credential reuse
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in pgAdmin 4. When running in server mode, an authenticated user can supply connection parameters that reference service definitions or environment variables belonging to the operating system account running the application. This could allow an attacker to connect to database systems using credentials configured for the host account, leading to unauthorized access and data modification.
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Bug Depends On: 2568978    
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Description OSIDB Bzimport 2026-11-06 16:23:20 UTC 
libpq looks a connection service up in the service file of the operating-system account running pgAdmin 4, and an entry there can hold a password or name a password file or client certificate. In server mode any user could set a server's Service, or a "service" connection parameter, to one of those entries and connect with its credentials. A PGPASSWORD or PGSERVICE variable set for that account was likewise used by libpq for every connection without a value of its own and passed on to the utilities, and pg_dumpall read a maintenance database name such as "service=..." as a connection string.

The fix adds the SERVER_MODE_ALLOWED_SERVICES setting, empty by default: in server mode only a listed service can be used, the servicefile parameter is refused, and PGPASSWORD and PGSERVICE are removed from pgAdmin's environment at startup. The allowlist is checked again on the final connection string, and the pg_dumpall database name is wrapped as a connection string.

This issue affects pgAdmin 4: before 9.19.