CVE-2012-4575: The add_database function in objects.c in the pgbouncer pooler 1.5.2 for PostgreSQL allows remote attackers to

Routine

MEDIUM 5.0DOWNGRADE

CVE-2012-4575 is a medium-severity flaw (CVSS 5.0) affecting pgbouncer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The add_database function in objects.c in the pgbouncer pooler 1.5.2 for PostgreSQL allows remote attackers to cause a denial of service (daemon outage) via a long database name in a request.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-119
Published	2012-11-18
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: pgbouncer project

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-11-18 19:55 UTCPublished CVE record published
2026-06-16 23:45 UTCUpdated Record last modified

pgbouncer project pgbouncer DOWNGRADE

Affected: 1.5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.2

1. Check installed version

apt-cache policy pgbouncer || rpm -q pgbouncer || pgbouncer --version

2. No fixed release: DOWNGRADE to a release before 1.5.2 (Debian / Ubuntu)

apt-cache madison pgbouncer sudo apt install pgbouncer=<VERSION_BEFORE_1.5.2> sudo apt-mark hold pgbouncer

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pgbouncer sudo dnf downgrade pgbouncer-<VERSION_BEFORE_1.5.2> sudo dnf versionlock add pgbouncer

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-4575?

pgbouncer: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-4575 being exploited?

CVE-2012-4575 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-4575 affect?

CVE-2012-4575 affects pgbouncer. Severity is medium (CVSS 5.0). The add_database function in objects.c in the pgbouncer pooler 1.5.2 for PostgreSQL allows remote attackers to cause a denial of service (daemon outage) via a long database name in a request.

How urgent is CVE-2012-4575?

Priority 38/100. No elevated risk signals yet.

Software pages

PostgreSQL vulnerabilities

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References

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