CVE-2026-6665

8.1 HIGH
Published: May 09, 2026 Modified: May 14, 2026
View on NVD

Description

The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://www.pgbouncer.org/changelog.html#pgbouncer-125x
Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Release Notes

1 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.1 / 10.0
EPSS (Exploit Probability)
0.4%
29th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

pgbouncer