CVE-2026-42198
pgjdbc: Unbounded PBKDF2 iterations in SCRAM authentication allows CPU exhaustion DoS
At a glance
- Severity
- HIGH 7.5
- EPSS
- EPSS 3.26 % · percentile 88 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-98qh-xjc8-98pq — pgjdbc: Unbounded PBKDF2 iterations in SCRAM authentication allows CPU exhaustion DoS
European references
- ENISA EUVD · EUVD-2026-26247
- GCVE · GCVE-0-2026-42198
CERT-FR advisories
- CERTFR-2026-AVI-1378 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0934 — Multiples vulnérabilités dans les produits Atlassian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0698 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:postgresql:postgresql_jdbc_driver:*:*:*:*:*:*:*:*≥ 42.2.0 < 42.7.11
Affected products
| Product | Versions |
|---|---|
| pgjdbc · pgjdbc | affected >= 42.2.0, < 42.7.11 |
References
- https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq
- https://github.com/pgjdbc/pgjdbc/releases/tag/REL42.7.11
- https://access.redhat.com/security/cve/CVE-2026-42198
- https://bugzilla.redhat.com/show_bug.cgi?id=2463857
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42198.json
- https://access.redhat.com/errata/RHSA-2026:52928
- https://access.redhat.com/errata/RHSA-2026:24348
- https://access.redhat.com/errata/RHSA-2026:25030
- https://access.redhat.com/errata/RHSA-2026:59278
- https://access.redhat.com/errata/RHSA-2026:59277
- https://access.redhat.com/errata/RHSA-2026:52978
- https://access.redhat.com/errata/RHSA-2026:54532
- https://access.redhat.com/errata/RHSA-2026:52929
- https://access.redhat.com/errata/RHSA-2026:52930
- https://access.redhat.com/errata/RHSA-2026:22304
- https://access.redhat.com/errata/RHSA-2026:66545
- https://access.redhat.com/errata/RHSA-2026:66488
- https://access.redhat.com/errata/RHSA-2026:19098
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |