CVE-2026-33815 CVE-2026-33815 in github.com/jackc/pgx
A memory-safety vulnerability in the pgx Go driver allows attackers to potentially execute arbitrary code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33815?
CVE-2026-33815 is a critical memory corruption vulnerability in github.com/jackc/pgx/v5/pgproto3, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Memory-safety vulnerability in github.com/jackc/pgx/v5.
Weakness: CWE-787
Which versions are affected by CVE-2026-33815?
3 open source packages ship an affected version, including github.com/jackc/pgx/v5. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/jackc/pgx/v5 Go | All versions | 5.9.0 |
github.com/jackc/pgx/v5 Go | All versions | 5.9.0 |
github.com/jackc/pgx/v5 Go | All versions | 5.9.0 |
Products include Jackc Pgx.
How do I fix CVE-2026-33815?
Upgrade github.com/jackc/pgx/v5 to 5.9.0 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-33815 being exploited?
There is no known exploitation of CVE-2026-33815 in the wild and no public exploit code.
Other vulnerabilities in github.com/jackc/pgx/v5/pgproto3
Sources
Also known as CLEANSTART-2026-JS92674, CLEANSTART-2026-VL17238, CLEANSTART-2026-ZW76652, DEBIAN-CVE-2026-33815, ECHO-b55a-3afc-2e4a, GHSA-xgrm-4fwx-7qm8 and 118 more.