CVE-2026-4427
Publication date 20 March 2026
Last updated 20 March 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| golang-github-jackc-pgproto3 | 25.10 questing |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-4427
- https://github.com/jackc/pgx/issues/2507
- https://access.redhat.com/security/cve/CVE-2026-4427
- https://bugzilla.redhat.com/show_bug.cgi?id=2448626
- https://github.com/golang/vulndb/issues/4518
- https://github.com/jackc/pgproto3
- https://securityinfinity.com/research/memory-safety-vulnerabilities-in-go-postgresql-wire-protocol-parsers-pgproto3-pgx