CVE-2026-4427

high

Description

A flaw was found in pgproto3. A malicious or compromised PostgreSQL server can exploit this by sending a DataRow message with a negative field length. This input validation vulnerability can lead to a denial of service (DoS) due to a slice bounds out of range panic.

References

https://securityinfinity.com/research/memory-safety-vulnerabilities-in-go-postgresql-wire-protocol-parsers-pgproto3-pgx

https://github.com/jackc/pgx/issues/2507

https://github.com/jackc/pgproto3

https://github.com/golang/vulndb/issues/4518

https://bugzilla.redhat.com/show_bug.cgi?id=2448626

https://access.redhat.com/security/cve/CVE-2026-4427

Details

Source: Mitre, NVD

Published: 2026-03-19

Updated: 2026-03-20

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.00065