CVE-2026-6665

HIGH

8.1

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.

CVE Details

CVSS v3.1 Score8.1

SeverityHIGH

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

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published5/9/2026

Last Modified5/9/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-121

References

https://www.pgbouncer.org/changelog.html#pgbouncer-125x(f86ef6dc-4d3a-42ad-8f28-e6d5547a5007)

IOC Correlations

No correlations recorded

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