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CVE-2026-42198 postgresql JDBC Driver

Affected softwarepostgresql JDBC Driver
Severity7.5 High CVSS 3.1 2 scores
Fixed in42.7.11
WeaknessCWE-770
Published29 Apr 2026
Updated11 Nov 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 3.3% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.
Candidate fix https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq : the maintainers' own security advisory: names the version that fixes it, so the fix is the difference between two releases

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H security-advisories@github.com Secondary published
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H redhat-SADP Secondary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update July 2026 ↗ CPU 2026-Q3 Oracle Communications / CNC Console (PostgreSQL JDBC Driver) (25.1.203, 25.2.201)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications CNC Console (PostgreSQL JDBC Driver) 25.1.203, 25.2.201 25.1.203 · 25.2.201

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.postgresql:postgresql 42.2.0 42.7.11 unbounded

Products and versions

2 products, 2 version entries
SourceVendorProductSchemeAffected versions
osv org.postgresql postgresql generic ≥ 42.2.0 and < 42.7.11
nvd postgresql postgresql jdbc driver generic ≥ 42.2.0 and < 42.7.11

References

URLTags
https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq advisory
https://github.com/pgjdbc/pgjdbc PACKAGE
https://github.com/pgjdbc/pgjdbc/releases/tag/REL42.7.11 WEB
https://access.redhat.com/errata/RHSA-2026:19098
https://access.redhat.com/errata/RHSA-2026:22304
https://access.redhat.com/errata/RHSA-2026:24348
https://access.redhat.com/errata/RHSA-2026:25030
https://access.redhat.com/errata/RHSA-2026:52928
https://access.redhat.com/errata/RHSA-2026:52929
https://access.redhat.com/errata/RHSA-2026:52930

Timeline

Published2026-04-29By the CVE Program.
NVD record modified2026-11-11NVD's own last-modified date for this record.