CVE-2026-6665CRITICAL 9.8EPSS p28.8%

CVE-2026-6665CVE-2026-6665

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.37% probability of exploitation · percentile 28.8% · 2026-06-19T12:03:05Z
Published2026-05-09
Last modified2026-05-14

Underlying weaknesses· 1

CWE-121

References

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

1

TypeTargetConfidenceTier
WeaknessStack-based Buffer Overflowcwe-1210%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.