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TI-2026-16122 Aliases CVE-2026-19888GHSA-w79m-39mq-x36c

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

Priority LOW 39CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00392 33rd percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—PgBouncerup to 1.25.2—No fix listedCNA
  • PgBouncer Vendor— Affected up to 1.25.2 Fixed in — No fix listed CNA

Remediation

Red Hat 1 advisory

  • RHSA-2026:70698 Released 2026-09-23 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images pgbouncer-1.26.0-0.1.hum1@aarch64, pgbouncer-1.26.0-0.1.hum1@src, pgbouncer-1.26.0-0.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:70698

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19888
  2. 2026-10-03 Alias added: GHSA-w79m-39mq-x36c

References

Other 1

Sources

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