Vulnerability DatabaseCVE-2026-4427
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CVE-2026-4427
March 19, 2026
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.
Related Resources (7)
https://bugzilla.redhat.com/show_bug.cgi?id=2448626
https://github.com/jackc/pgproto3
https://access.redhat.com/security/cve/CVE-2026-4427
https://securityinfinity.com/research/memory-safety-vulnerabilities-in-go-postgresql-wire-protocol-parsers-pgproto3-pgx
https://github.com/golang/vulndb/issues/4518
https://nvd.nist.gov/vuln/detail/CVE-2026-4427
https://github.com/jackc/pgx/issues/2507
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Improper Validation of Array Index
CWE-129
EPSS
Base Score:
0.07