# PostgreSQL JDBC Driver Security Bypass Flaw

Published: 2026-07-06 · Severity: medium
Canonical: https://vorant.io/reports/2682ba27-3008-5e6b-bd5c-7880cc2f4a0d/postgresql-jdbc-driver-security-bypass-flaw

> A vulnerability in PostgreSQL JDBC driver versions 42.7.4 through 42.7.11 allows attackers to bypass security policy.

ANSSI (CERT-FR) issued an advisory describing a security policy bypass vulnerability affecting the PostgreSQL JDBC driver, impacting versions greater than or equal to 42.7.4 and prior to 42.7.12. The flaw is tracked as CVE-2026-54291 and was disclosed alongside a PostgreSQL JDBC security release published on July 6, 2026.

The advisory does not indicate active exploitation in the wild; it is a vendor-driven patch notification. Affected organizations using the vulnerable JDBC driver versions in Java applications connecting to PostgreSQL databases should apply the vendor-provided patches referenced in the official PostgreSQL security bulletin.

## Mentioned in this report

- Vulnerabilities: CVE-2026-54291

Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0837

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