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NVD Vulnerability Details :

CVE-2026-6665

Received

Source-f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Published At-09 May, 2026 | 01:16

Updated At-09 May, 2026 | 01:16

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	3.1	8.1	HIGH	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Type: Secondary

Version: 3.1

Base score: 8.1

Base severity: HIGH

Vector:

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE ID	Type	Source
CWE-121	Secondary	f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

CWE ID: CWE-121

Type: Secondary

Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

References

Hyperlink	Source	Resource
https://www.pgbouncer.org/changelog.html#pgbouncer-125x	f86ef6dc-4d3a-42ad-8f28-e6d5547a5007	N/A

Hyperlink: https://www.pgbouncer.org/changelog.html#pgbouncer-125x

Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Resource: N/A

CISA Catalog

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Change History