--- id: CVE-2026-42198 title: pgjdbc is an open source postgresql JDBC Driver summary: >- 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 pe… severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-770 vendor: postgresql product: postgresql_jdbc_driver affected: - 'postgresql_jdbc_driver >= 42.2.0, < 42.7.11' patched: - postgresql_jdbc_driver 42.7.11 published: '2026-04-29' updated: '2026-09-11' sourceUpdated: '2026-09-11T13:17:58.347' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42198' references: - url: 'https://github.com/pgjdbc/pgjdbc/releases/tag/REL42.7.11' label: security-advisories@github.com - url: 'https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq' label: security-advisories@github.com - url: 'https://access.redhat.com/errata/RHSA-2026:19098' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:22304' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:24348' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:25030' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:52928' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:52929' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:52930' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:52978' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:54532' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:59277' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:59278' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:66488' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:66545' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-42198' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2463857' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42198.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://www.cve.org/CVERecord?id=CVE-2026-42198' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42198' tags: - nvd - cve.org - csaf - vex - red-hat ssvc: exploitation: none automatable: 'yes' technicalImpact: partial timestamp: '2026-04-29T18:00:34.512715Z' epss: 0.04117 epssPercentile: 0.90412 ingestedAt: '2026-07-10T14:03:54.797Z' --- ## Overview 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. ## Affected - `postgresql_jdbc_driver >= 42.2.0, < 42.7.11` ## Remediation Upgrade past the affected range: - `postgresql_jdbc_driver 42.7.11` ## Vendor advisories - **RHSA-2026:52928** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52928) - **RHSA-2026:24348** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-06-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:24348) - **RHSA-2026:25030** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-06-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:25030) - **RHSA-2026:59278** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59278) - **RHSA-2026:59277** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59277) - **RHSA-2026:52978** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52978) - **RHSA-2026:54532** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54532) - **RHSA-2026:52929** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52929) - **RHSA-2026:52930** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52930) - **RHSA-2026:22304** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-06-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:22304) - **RHSA-2026:66545** · Red Hat · fixed in: Red Hat AMQ Broker 7.13.6 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66545) - **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-09-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42198.json)