CVE-2026-33815: Github.com/jackc/pgx/v5 Pgx Contains Memory-safety Vulnerability Vulnerability
CRITICALCVE-2026-33815 is a CRITICAL (CVSS 9.8) pgx contains memory-safety vulnerability vulnerability (General Security Weakness) affecting Github.com/jackc/pgx/v5 libraries in the Go ecosystem. The issue involves pgx contains memory-safety vulnerability. Remediation is available by upgrading affected packages to version 5.9.0.
CVE-2026-33815 at a Glance
Security Impact
CVSS: 9.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2026-33815
To remediate this vulnerability, upgrade all affected Github.com/jackc/pgx/v5 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/jackc/pgx/v5 to 5.9.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/jackc/pgx/v5How to Check if You Are Affected
To determine whether your application is affected by CVE-2026-33815, inspect your project dependencies for Github.com/jackc/pgx/v5:
inspect dependencies for github.com/jackc/pgx/v5Analyze the terminal output to locate any version of Github.com/jackc/pgx/v5 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.9.0), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under General Security Weakness. In Github.com/jackc/pgx/v5, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-33815 Affected Github.com/jackc/pgx/v5 Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/jackc/pgx/v5
|
Go |
< 5.9.0
|
5.9.0
|
References
Frequently Asked Questions
What is CVE-2026-33815?
Which Github.com/jackc/pgx/v5 versions are affected?
What version fixes CVE-2026-33815?
Is github.com/jackc/pgx/v5 affected?
What is the CVSS score of CVE-2026-33815?
What CWE is associated with CVE-2026-33815?
How can I check Go dependencies for CVE-2026-33815?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-xgrm-4fwx-7qm8",
"modified" : "2026-06-26T20:04:58Z",
"published" : "2026-04-07T18:31:36Z",
"aliases" : [ "CVE-2026-33815" ],
"summary" : "pgx contains memory-safety vulnerability",
"details" : "[pgx](github.com/jackc/pgx/v5) is a pure Go driver and toolkit for PostgreSQL. pgx prior to v5.9.0 contains a memory-safety vulnerability.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/jackc/pgx/v5"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "5.9.0"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33815"
}, {
"type" : "WEB",
"url" : "https://github.com/jackc/pgx/issues/2519"
}, {
"type" : "WEB",
"url" : "https://github.com/jackc/pgx/issues/2530"
}, {
"type" : "WEB",
"url" : "https://github.com/jackc/pgx/commit/6dbad4cafdb8a4daab7ff79c858c95da4b6109e8"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2026-4771"
}, {
"type" : "PACKAGE",
"url" : "github.com/jackc/pgx/v5"
} ],
"database_specific" : {
"cwe_ids" : [ ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2026-04-10T14:10:46Z",
"nvd_published_at" : "2026-04-07T16:16:24Z"
}
}