Memory-safety flaw in Go pgx pgproto3 component
CVE-2026-33816 Published on April 7, 2026

CVE-2026-33816 in github.com/jackc/pgx
Memory-safety vulnerability in github.com/jackc/pgx/v5.

NVD

Vulnerability Analysis

CVE-2026-33816 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and a small impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
LOW

Weakness Type

What is a Memory Corruption Vulnerability?

The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.

CVE-2026-33816 has been classified to as a Memory Corruption vulnerability or weakness.


Products Associated with CVE-2026-33816

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Red Hat Cryostat
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Openshift Custom Metrics Autoscaler
 
Red Hat Multicluster Globalhub
 
Red Hat Acm
 
Red Hat Advanced Cluster Security
 
Red Hat Hummingbird
 
Red Hat Openshift Pipelines
 
Red Hat Trusted Artifact Signer
 
Red Hat Multicluster Engine
 
Red Hat 3scale Amp
 
Red Hat Edge Manager
 
Red Hat Openshift Ai
 
Red Hat Openshift Data Foundation
 
Red Hat Zero Trust Workload Identity Manager
 
Red Hat Quay
 

Affected Versions

github.com/jackc/pgx/v5/pgproto3: Red Hat Cryostat 4 on RHEL 9: Red Hat Enterprise Linux AppStream (v. 10): Red Hat Custom Metric Autoscaler 2.19: Red Hat Multicluster Global Hub 1.3.4: Red Hat Multicluster Global Hub 1.7.1: Red Hat Advanced Cluster Management for Kubernetes 2.15: Red Hat Advanced Cluster Management for Kubernetes 2.16: Red Hat Advanced Cluster Security for Kubernetes 4.10: Red Hat Advanced Cluster Security for Kubernetes 4.8: Red Hat Advanced Cluster Security for Kubernetes 4.9: Red Hat Hardened Images: Red Hat OpenShift Pipelines 1.21: Red Hat Trusted Artifact Signer 1.3: Custom Metric Autoscaler operator for Red Hat Openshift: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Global Hub: Red Hat 3scale API Management Platform 2: Red Hat Advanced Cluster Security 4: Red Hat Edge Manager 1: Red Hat OpenShift AI (RHOAI): Red Hat Openshift Data Foundation 4: Red Hat Trusted Artifact Signer: Red Hat Zero Trust Workload Identity Manager - Tech Preview: Red Hat Quay 3: Red Hat Zero Trust Workload Identity Manager: Red Hat OpenShift Pipelines:

Exploit Probability

EPSS
0.38%
Percentile
29.44%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.