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VULNERABILITIES

CVE-2026-107350 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: PostgreSQLCVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://www.pgbouncer.org/changelog.html PostgreSQL

Weakness Enumeration

CWE-IDCWE NameSource
CWE-287Improper AuthenticationPostgreSQL

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-107350
NVD Published Date:
Oct 14, 2026
NVD Last Modified:
Oct 16, 2026
Source:
PostgreSQL
CVE-2026-107350 Details - Not Deferred