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Status published
High
CVE-2021-3935
When PgBouncer is configured to use "cert" authentication, a man-in-the-middle...
Vulnerability Description
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 TLS certificate verification and encryption. This flaw affects PgBouncer versions prior to 1.16.1.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2021251
- http://www.pgbouncer.org/changelog.html#pgbouncer-116x
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNPCV3KRDI5PLLLKADFVIOHACQJLZMLI/
- https://lists.debian.org/debian-lts-announce/2022/02/msg00016.html
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Affected Vendor
Affected Software
pgbouncer
Vulnerable Versions:
PgBouncer 1.16.1
Timeline
Official Publish:
November 22nd, 2021
Last Modified:
November 3rd, 2025
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H