---
id: "CVE-2026-123491"
page: "https://infrastack.ai/live/CVE-2026-123491"
kind: "vulnerability"
aliases: ["CVE-2026-123491"]
title: "Craft CMS: GraphQL eager-loading SQL injection exposes database contents"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["craft-cms", "graphql", "package", "php", "self-hosted"]
not_affected_if: ["auth-required", "graphql-disabled"]
published_at: "2026-11-06T15:17:18+00:00"
first_seen_at: "2026-11-06T15:42:44+00:00"
updated_at: "2026-11-06T15:44:02+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123491", "first_seen_at": "2026-11-06T15:42:44+00:00"}]
exploit_sources: []
---

# Craft CMS: GraphQL eager-loading SQL injection exposes database contents

Link for people: https://infrastack.ai/live/CVE-2026-123491 (this .md is for agents)

Craft CMS versions 4.0.0 before 4.18.9 and 5.0.0 before 5.11.2 let GraphQL eager-loading copy unsanitized arguments into database queries. An unauthenticated attacker can inject SQL to read arbitrary database content, including password hashes and session tokens.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Craft CMS version in `composer.lock` or by running `composer show craftcms/cms`.
- Confirm whether the site exposes a public GraphQL endpoint.

## Fix

- Craft CMS 4.x: upgrade to `4.18.9` or later.
- Craft CMS 5.x: upgrade to `5.11.2` or later.

## Timeline

- 2026-11-06T15:42:44+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123491

## Documents

- [advisory] Vendor advisory: github.com https://github.com/craftcms/cms/security/advisories/GHSA-mjj9-pjh4-r48g
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/craft-cms-4.0.0-before-4.18.9-unauthenticated-sql-injection-via-graphql-eager-load-select

## From the sources

Craft CMS 4.0.0 before 4.18.9 and 5.0.0 before 5.11.2 contains an SQL injection vulnerability in GraphQL eager-loading: arguments on eager-loadable nodes absent from the public schema are copied into EagerLoadPlan criteria without cleansing. Unauthenticated attackers can supply a parenthesized select argument to inject SQL expressions and read arbitrary database content, including password hashes and session tokens.

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