CVE-2021-3935

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

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.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-3935

OS impact

OSVersionStatusFixed in
arch archfixed1.16.1-1
debian debianbookwormfixed1.16.1-1
debian debianbullseyefixed1.15.0-1+deb11u1
debian debianforkyfixed1.16.1-1
debian debiansidfixed1.16.1-1
debian debiantrixiefixed1.16.1-1

References

Verify integrity in audit chain (admin only). AS-IS.