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CVE-2026-19888

NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer

HIGH
7.5
CVSS Score
Published: September 23, 2026 at 04:04 PM UTC
Updated: September 23, 2026 at 07:50 PM UTC
1 product affected across 1 vendorPgbouncer

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Pgbouncer· Pgbouncer
60%
v ≤ 1.25.2

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://www.pgbouncer.org/changelog.html

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHPostgreSQL
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-476

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