Critical severity · published Apr 7, 2026
CVE-2026-33816
CVE-2026-33816 in github.com/jackc/pgx
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
Memory-safety vulnerability in github.com/jackc/pgx/v5.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
github.com/jackc/pgx/v5/pgproto3 · github.com/jackc/pgx/v5
before 5.9.0 · source: vendor
PG
Pgx · Jackc
before 5.9.0 · source: NVD
C4
Cryostat 4 on RHEL 9 · Red Hat
All versions, or not specified · source: CISA
CM
Custom Metric Autoscaler 2.19 · Red Hat
All versions, or not specified · source: CISA
ME
Multicluster Engine for Kubernetes · Red Hat
All versions, or not specified · source: CISA
MG
Multicluster Global Hub · Red Hat
All versions, or not specified · source: CISA
MG
Multicluster Global Hub 1.3.4 · Red Hat
All versions, or not specified · source: CISA
MG
Multicluster Global Hub 1.7.0 · Red Hat
All versions, or not specified · source: CISA
OP
OpenShift Pipelines · Red Hat
All versions, or not specified · source: CISA
R1
RHEM 1.0 for RHEL 9 · Red Hat
All versions, or not specified · source: CISA
R1
RHEM 1.1 for RHEL 10 · Red Hat
All versions, or not specified · source: CISA
R1
RHEM 1.1 for RHEL 9 · Red Hat
All versions, or not specified · source: CISA
Affected product
GI
github.com/jackc/pgx/v5/pgproto3
github.com/jackc/pgx/v5
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33816
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33816
Third Party Advisory
https://pkg.go.dev/vuln/GO-2026-4772
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:11070
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:11217
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:13791
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:13829
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:13907
More from github.com/jackc/pgx/v5/pgproto3
9.8
CVE-2026-33815
CVE-2026-33815 in github.com/jackc/pgx