Bug 2552733 (CVE-2026-107350) - CVE-2026-107350 pgbouncer: pgbouncer: Privilege escalation via secondary startup message during SCRAM authentication
Summary: CVE-2026-107350 pgbouncer: pgbouncer: Privilege escalation via secondary star...
Keywords:
Status: NEW
Alias: CVE-2026-107350
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2553068 2553069
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-14 17:52 UTC by OSIDB Bzimport
Modified: 2026-10-15 07:18 UTC (History)
0 users

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-10-14 17:52:05 UTC 
Improper authentication in PgBouncer 1.17.0 through 1.26.0 allows a remote attacker who knows the password of a user listed in auth_file to log in as any other user that authenticates using SCRAM, including PgBouncer admin users and backend superusers. A second StartupMessage sent during SCRAM authentication against a non-existent database is not rejected and switches the user being logged in as, while the SCRAM exchange is still verified against the keys of the first user.
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