What is CVE-2026-33816?

CVE-2026-33816 is a critical-severity vulnerability in Github.com/jackc/pgx/v5 Github.com/jackc/pgx/v5/pgproto3, classified under CWE-697 — INCORRECT COMPARISON. CVSS score: 9.8/10. Published 2026-04-07.

How severe is CVE-2026-33816?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Github.com/jackc/pgx/v5 Github.com/jackc/pgx/v5/pgproto3

CVE-2026-33816

Memory-safety vulnerability in github.com/jackc/pgx/v5.

EPSS: 0.000 (6.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Github.com/jackc/pgx/v5 Github.com/jackc/pgx/v5/pgproto3 — versions 0
Jackc Pgx

References

security@golang.org (Third Party Advisory)

Frequently asked questions

What is CVE-2026-33816?: CVE-2026-33816 is a critical-severity vulnerability in Github.com/jackc/pgx/v5 Github.com/jackc/pgx/v5/pgproto3, classified under CWE-697 — INCORRECT COMPARISON. CVSS score: 9.8/10. Published 2026-04-07.
How severe is CVE-2026-33816?: Critical severity. CVSS v3 base score is 9.8 out of 10.