high8.8
CVE-2026-107350
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…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| PgBouncer | PgBouncer 1.17.0 | through 1.26.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.