CVE-2026-4427
HIGH7.5Duplicate Advisory: pgproto3: Negative field length panics in DataRow.Decode
Published: 3/19/2026Modified: 3/30/2026
Description
## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-jqcq-xjh3-6g23. This link is maintained to preserve external references. ## Original 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.
Affected packages (2)
- Debian/golang-github-jackc-pgproto3from 0
- Go/github.com/jackc/pgproto3/v2from 0, <= 2.3.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (8)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-4427
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-4427
- PATCHhttps://github.com/jackc/pgproto3
- WEBhttps://access.redhat.com/security/cve/CVE-2026-4427
- WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=2448626
- WEBhttps://github.com/golang/vulndb/issues/4518
- WEBhttps://github.com/jackc/pgx/issues/2507
- WEBhttps://securityinfinity.com/research/memory-safety-vulnerabilities-in-go-postgresql-wire-protocol-parsers-pgproto3-pgx