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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 6
https://access.redhat.com/security/cve/CVE-2026-4427
secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2448626
secalert@redhat.com
https://github.com/golang/vulndb/issues/4518
secalert@redhat.com
https://github.com/jackc/pgproto3
secalert@redhat.com
https://github.com/jackc/pgx/issues/2507
secalert@redhat.com
https://securityinfinity.com/research/memory-safety-vulnerabilities-in-go-postg…
secalert@redhat.com