CVE-2025-12819: Untrusted search path in auth_query connection in PgBouncer

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-03 · updated 2026-10-18
Weakness: CWE-426

Description

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 search_path parameter in the StartupMessage.

Affected products

PgBouncer: before 1.25.1 — fixed in 1.25.1

How to fix

Upgrade to a fixed version: PgBouncer 1.25.1. Check the vendor advisory for mitigations.

References

https://www.pgbouncer.org/changelog.html#pgbouncer-125x
https://lists.debian.org/debian-lts-announce/2025/12/msg00033.html

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