CVE-2026-19888
NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer
- State
- Published
- Severity
- 7.5 High
- Published
- Sep 23, 2026
- Updated
- Sep 23, 2026
- Reserved
- Aug 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | PostgreSQL |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
PgBouncern/a |
|
References
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