Bug 2463857 (CVE-2026-42198) - CVE-2026-42198 jdbc.postgresql.org: pgjdbc: Client-side Denial of Service via malicious SCRAM-SHA-256 authentication
Summary: CVE-2026-42198 jdbc.postgresql.org: pgjdbc: Client-side Denial of Service via...
Keywords:
Status: NEW
Alias: CVE-2026-42198
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2466758
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-29 17:01 UTC by OSIDB Bzimport
Modified: 2026-08-13 11:27 UTC (History)
27 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:22304 0 None None None 2026-06-01 10:09:44 UTC
Red Hat Product Errata RHSA-2026:24348 0 None None None 2026-06-08 03:03:19 UTC
Red Hat Product Errata RHSA-2026:25030 0 None None None 2026-06-10 09:49:20 UTC
Red Hat Product Errata RHSA-2026:52928 0 None None None 2026-08-10 15:35:20 UTC
Red Hat Product Errata RHSA-2026:52929 0 None None None 2026-08-10 16:03:13 UTC
Red Hat Product Errata RHSA-2026:52930 0 None None None 2026-08-10 16:10:29 UTC
Red Hat Product Errata RHSA-2026:52978 0 None None None 2026-08-10 18:24:06 UTC
Red Hat Product Errata RHSA-2026:54532 0 None None None 2026-08-13 11:27:30 UTC

Description OSIDB Bzimport 2026-04-29 17:01:22 UTC 
pgjdbc is an open source postgresql JDBC Driver. From version 42.2.0 to before version 42.7.11, pgjdbc is vulnerable to a client-side denial of service during SCRAM-SHA-256 authentication. A malicious server can instruct the driver to perform SCRAM authentication with a very large iteration count. With a large enough value, the client spends an unbounded amount of CPU time inside PBKDF2 before authentication can fail. A single attempt ties up a CPU core. Repeated or concurrent attempts exhaust client CPU and can wedge connection pools. In affected versions, loginTimeout did not fully mitigate this problem. When loginTimeout expired, the caller could stop waiting, but the worker thread performing the connection attempt could continue running and burning CPU inside the SCRAM PBKDF2 computation. This issue has been patched in version 42.7.11.
Comment 3 errata-xmlrpc 2026-06-01 10:09:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:22304 https://access.redhat.com/errata/RHSA-2026:22304
Comment 4 errata-xmlrpc 2026-06-08 03:03:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:24348 https://access.redhat.com/errata/RHSA-2026:24348
Comment 5 errata-xmlrpc 2026-06-10 09:49:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:25030 https://access.redhat.com/errata/RHSA-2026:25030
Comment 9 errata-xmlrpc 2026-08-10 15:35:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:52928 https://access.redhat.com/errata/RHSA-2026:52928
Comment 10 errata-xmlrpc 2026-08-10 16:03:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:52929 https://access.redhat.com/errata/RHSA-2026:52929
Comment 11 errata-xmlrpc 2026-08-10 16:10:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:52930 https://access.redhat.com/errata/RHSA-2026:52930
Comment 12 errata-xmlrpc 2026-08-10 18:24:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:52978 https://access.redhat.com/errata/RHSA-2026:52978
Comment 13 errata-xmlrpc 2026-08-13 11:27:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:54532 https://access.redhat.com/errata/RHSA-2026:54532
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