CVE-2026-6665

CRITICAL EPSS 29.0%
Published May 9, 20261mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published May 9, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
29.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-121

Affected Products 1

VendorProductVersionRange
pgbouncerpgbouncer* <1.25.2

References 1

  • pgbouncer.org https://www.pgbouncer.org/changelog.html#pgbouncer-125x
    Release Notes

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.