# CVE-2026-4427: Duplicate Advisory: pgproto3: Negative field length panics in DataRow.Decode

Source: https://junglewise.ai/threats/cve-2026-4427-duplicate-advisory-pgproto3-negative-field-length-panics-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-19  
License: CC BY 4.0 with a link back

CVE-2026-4427 · Severity: low · CVSS 3.1 · Published 2026-03-19

Duplicate Advisory: pgproto3: Negative field length panics in DataRow.Decode

Technologies: [github.com/jackc/pgproto3/v2 (Go)](https://junglewise.ai/threats/technologies/github-com-jackc-pgproto3-v2). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-4427 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-4427 being exploited in the wild.

**How severe is CVE-2026-4427?** Low severity, with a CVSS score of 3.1, published 19 March 2026.

**Which products and versions are affected?** github.com/jackc/pgproto3/v2 (Go) SEMVER:introduced=0,last_affected=2.3.3.

**Is there a fix for CVE-2026-4427?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-4427?** Check whether you run github.com/jackc/pgproto3/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- github.com/jackc/pgproto3/v2 (Go) SEMVER:introduced=0,last_affected=2.3.3

## Identifiers

- CVE-2026-4427
- GHSA-x6gf-mpr2-68h6

## Related threats

- [Jackc pgproto3 denial of service in DataRow.Decode](https://junglewise.ai/threats/cve-2026-32286-jackc-pgproto3-denial-of-service-in-datarow-decode)
- [GO-2024-2606 - SQL injection in github.com/jackc/pgproto3 and github.com/jackc/pgx](https://junglewise.ai/threats/cve-2024-27304-pgproto3-sql-injection-via-protocol-message-size-overflow)