CVE-2026-19888

7.5 highEPSS 0.4%

High (7.5). EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
CWE: CWE-476
Published: 2026-09-23
Modified: 2026-09-23
Record from: the NVD, synced 2026-10-19

References

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

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