Vulnerabilities in pkg:golang/github.com/jackc/pgx/v5

PACKAGE
Advisory Identifier: GHSA-xgrm-4fwx-7qm8
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Advisory Summary

CVE-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.

5 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/github.com/jackc/pgx/v5

5 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/github.com/jackc/pgx/v5. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-xgrm-4fwx-7qm8 CVE-2026-33815 CRITICAL pgx contains memory-safety vulnerability
GHSA-j88v-2chj-qfwx CVE-2026-41889 LOW pgx: SQL Injection via placeholder confusion with dollar quoted string literals
GHSA-9jj7-4m8r-rfcm CVE-2026-33816 CRITICAL Memory-safety vulnerability in github.com/jackc/pgx/v5.
GHSA-fqpg-rq76-99pq - MODERATE Panic in Pipeline when PgConn is busy or closed in github.com/jackc/pgx
GHSA-mrww-27vc-gghv CVE-2024-27304 HIGH pgx SQL Injection via Protocol Message Size Overflow

CVE-2026-33815 at a Glance

CVE Identifier CVE-2026-33815
GHSA Identifier GHSA-xgrm-4fwx-7qm8
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Github.com/jackc/pgx/v5
Package Ecosystem Go
Published Date
Last Updated

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).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (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.

github.com/jackc/pgx/v5 fixed: 5.9.0 
Upgrade github.com/jackc/pgx/v5 to 5.9.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/jackc/pgx/v5

How 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/v5

Analyze 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

[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.

CVE-2026-33815 Affected Github.com/jackc/pgx/v5 Versions

1 component(s)
Fixed Versions:
5.9.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/jackc/pgx/v5
golang/github.com/jackc/pgx/v5
Go
< 5.9.0
5.9.0

References

NVD — CVE-2026-33815 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33815
Github.com/jackc/pgx/v5 Source Repository REPOSITORY
https://github.com/jackc/pgx/issues/2519
Github.com/jackc/pgx/v5 Source Repository REPOSITORY
https://github.com/jackc/pgx/issues/2530
Security Fix Commit FIX COMMIT
https://github.com/jackc/pgx/commit/6dbad4cafdb8a4daab7ff79c858c95da4b6109e8
pkg.go.dev/vuln/go-2026-4771 WEB
https://pkg.go.dev/vuln/GO-2026-4771
github.com/jackc/pgx... PACKAGE
github.com/jackc/pgx/v5

Frequently Asked Questions

What is CVE-2026-33815?
CVE-2026-33815 is a security vulnerability in Github.com/jackc/pgx/v5 involving pgx contains memory-safety vulnerability under General Security Weakness.
Which Github.com/jackc/pgx/v5 versions are affected?
Affected versions include releases prior to 5.9.0 across affected packages: github.com/jackc/pgx/v5.
What version fixes CVE-2026-33815?
Upgrading to 5.9.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/jackc/pgx/v5 affected?
Yes, github.com/jackc/pgx/v5 is affected in releases prior to 5.9.0. Upgrade your dependency to 5.9.0 or later.
What is the CVSS score of CVE-2026-33815?
CVE-2026-33815 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-33815?
CVE-2026-33815 is classified under General Security Weakness.
How can I check Go dependencies for CVE-2026-33815?
Run the dependency tree command: 'inspect dependencies for github.com/jackc/pgx/v5'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "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"
  }
}