Allocation of Resources Without Limits or Throttling in Postgresql JDBC Driver - CVE-2026-42198

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Main Vulnerability Database Vulnerabilities #VU128414

Allocation of Resources Without Limits or Throttling in Postgresql JDBC Driver - CVE-2026-42198

Published: April 28, 2026


Vulnerability identifier: #VU128414
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42198
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to allocation of resources without limits or throttling in SCRAM-SHA-256 authentication handling when processing a server-supplied PBKDF2 iteration count. A remote attacker can send a specially crafted SCRAM server-first-message with a very large iteration count to cause a denial of service.

The issue is triggered only when the client uses SCRAM-SHA-256 authentication and reaches a malicious, compromised, or attacker-controlled PostgreSQL endpoint.


Affected software

Postgresql JDBC Driver
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Anolis OS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Server Applications Module
openSUSE Leap
openEuler
Fedora
Crucible Data Center
Crucible Server
IBM Watson Discovery for IBM Cloud Pak for Data
Jira Service Management Data Center
Crowd Data Center
IBM Sterling Connect:Direct Web Services
Jira Software Data Center
Red Hat build of Quarkus
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
ongres-stringprep
ongres-scram
junit5
postgresql-jdbc-javadoc
postgresql-jdbc
postgresql-jdbc (Red Hat package)
postgresql-jdbc-help
IBM Disconnected Log Collector

How to mitigate CVE-2026-42198

Install security update from vendor's website.

Postgresql JDBC Driver - update to 42.7.11
Crucible Data Center - update to 4.9.10
Crucible Server - update to 4.9.10
IBM Watson Discovery for IBM Cloud Pak for Data - update to 5.3.2
Jira Service Management Data Center - addressed in versions 10.3.23, 11.3.8
Crowd Data Center - update to 7.2.1
IBM Sterling Connect:Direct Web Services - addressed in versions 6.3.0.19, 6.4.0.8
Jira Software Data Center - addressed in versions 9.12.37, 10.3.23, 11.3.8
IBM Disconnected Log Collector - update to 2.0.1
ongres-stringprep - update to 2.4-1.fc45
ongres-scram - update to 3.3-1.fc45
Red Hat build of Quarkus - update to 3.27.3.SP2
junit5 - update to 5.14.4-1.fc45
postgresql-jdbc-javadoc - update to 42.2.14-4
postgresql-jdbc - update to 42.2.14-4
postgresql-jdbc (Red Hat package) - addressed in versions 42.2.14-4.el8_10, 42.2.14-5.el8_8.1, 42.2.28-1.el9_2.1, 42.2.28-1.el9_4.1, 42.2.28-1.el9_6.1, 42.2.28-2.el9_8.2, 42.7.1-7.el10_0.1
postgresql-jdbc - update to 42.2.25-150400.3.15.1
postgresql-jdbc-javadoc - update to 42.2.25-150400.3.15.1
postgresql-jdbc-javadoc - update to 42.4.1-4
postgresql-jdbc - update to 42.4.1-4
postgresql-jdbc-help - update to 42.4.1-4
postgresql-jdbc - update to 42.7.11-1.fc45

External References

Related Security Bulletins