CVE-2026-6664 Affecting pgbouncer package, versions <1.25.2-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-PGBOUNCER-16786517
- published21 May 2026
- disclosed9 May 2026
Introduced: 9 May 2026
CVE-2026-6664 (opens in a new tab)How to fix?
Upgrade Chainguard pgbouncer to version 1.25.2-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pgbouncer package and not the pgbouncer package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.