Vulnerability in PostgreSQL JDBC (July 6, 2026)

unknownCVE-2026-54291

A vulnerability has been discovered in PostgreSQL JDBC. It allows an attacker to bypass security policy.

CSIRTS triage

vendor: PostgreSQL product: PostgreSQL JDBC Authentication bypass

What: A vulnerability allows an attacker to bypass security policy.
Who is affected: Deployments using PostgreSQL JDBC are affected.
Urgency: Remediation is necessary to prevent unauthorized access due to the security policy bypass.
Action: Update to the latest version of PostgreSQL JDBC.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-07-06
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0837/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-542910.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-54291	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for PostgreSQL JDBC

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] PostgreSQL JDBC Driver: Vulnerability allows bypassing security measurescert-bund · 2026-07-07
mediumCVE-2026-54291: pgjdbc is an open source postgresql JDBC Driver. In releases 42.7.4 through 42.7.11, channelBi…nvd · 2026-07-06
lowPrivilege Escalation in Aurora PostgreSQL using AWS JDBC Wrapper, AWS Go Wrapper, AWS NodeJS Wrapper, AWS Pyth…aws · 2026-06-05