high7.5
CVE-2026-4427
Duplicate Advisory: pgproto3: Negative field length panics in DataRow.Decode
Impact
## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-jqcq-xjh3-6g23.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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/jackc/pgproto3/v2 | <= 2.3.3 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-x6gf-mpr2-68h6
- https://nvd.nist.gov/vuln/detail/CVE-2026-4427
- https://github.com/golang/vulndb/issues/4518
- 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/jackc/pgproto3
- https://securityinfinity.com/research/memory-safety-vulnerabilities-in-go-postgresql-wire-protocol-parsers-pgproto3-pgx