Loop with Unreachable Exit Condition ('Infinite Loop') Affecting pgbouncer package, versions <0:1.26.0-0.1.hum1


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.42% (37th percentile)

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  • Snyk IDSNYK-RHEL10-PGBOUNCER-20129748
  • published25 Sept 2026
  • disclosed23 Sept 2026

Introduced: 23 Sep 2026

CVE-2026-6669  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade RHEL:10 pgbouncer to version 0:1.26.0-0.1.hum1 or higher.
This issue was patched in RHSA-2026:70698.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pgbouncer package and not the pgbouncer package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resulting key derivation cannot be interrupted in frontend builds such as PgBouncer. Because PgBouncer serves all clients from a single process, one backend can in this way stop it from serving traffic for every other database and client it is pooling, so the failure of a single backend is not contained.

CVSS Base Scores

version 3.1