Detections
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Echo: pgbouncer: security update to 1.26.0-1

medium Tenable Cloud Security Plugin ID 455136

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-6669)

Solution

Update the pgbouncer library and its related packages to version 1.26.0-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-6669

Plugin Details

Severity: Medium

ID: 455136

Version: Revision 1.2

Type: Local

Published: 10/1/2026

Updated: 10/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.68

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-6669

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/26/2026

Vulnerability Publication Date: 9/23/2026

Reference Information

CVE: CVE-2026-6669