High severity · published May 23, 2017
CVE-2015-6817
PgBouncer 1.6.x before 1.6.1, when configured with auth_user, allows remote attackers to gain login access as auth_user via an unknown username
8.1
CVSS
2.2%
EPSS
No
On KEV
Description
PgBouncer 1.6.x before 1.6.1, when configured with auth_user, allows remote attackers to gain login access as auth_user via an unknown username.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.2% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PG
Pgbouncer · Pgbouncer
1.6 · source: NVD
Affected product
PG
Pgbouncer
Pgbouncer
More from Pgbouncer
9.8
CVE-2026-6665
PgBouncer buffer overflow in SCRAM
9.8
CVE-2025-2291
Password can be used past expiry in PgBouncer due to auth_query not taking into account Postgres its VALID UNTIL value, which allows an attacker to log in with an already expired…
8.1
CVE-2025-12819
Untrusted search path in auth_query connection handler in PgBouncer before 1.25.1 allows an unauthenticated attacker to execute arbitrary SQL during authentication via a malicious…
8.1
CVE-2021-3935
When PgBouncer is configured to use "cert" authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of…
7.5
CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error