CVE-2026-19888 — NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer

CVE-2026-19888

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

Description (CNA)

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 (CNA)

Vendor / product	Versions
n/a / PgBouncer	affected 0 through 1.25.2

CWE

CWE-476

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.