CVE-2026-31858: Craftcms/cms SQL Injection Vulnerability

HIGH
Advisory Identifier: GHSA-g7j6-fmwx-7vp8
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CWE-89
Published
Advisory Summary

CVE-2026-31858 is a HIGH sql injection vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')) affecting Craftcms/cms libraries in the Packagist ecosystem. The issue involves craftcms's `elementsearchcontroller` affected by blind sql injection. Remediation is available by upgrading affected packages to version 5.9.9.

CVE-2026-31858 at a Glance

CVE Identifier CVE-2026-31858
GHSA Identifier GHSA-g7j6-fmwx-7vp8
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Affected Product Craftcms/cms
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-31858

To remediate this vulnerability, upgrade all affected Craftcms/cms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

craftcms/cms fixed: 5.9.9 
Upgrade craftcms/cms to 5.9.9
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 craftcms/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-31858, inspect your project dependencies for Craftcms/cms:

inspect dependencies for craftcms/cms

Analyze the terminal output to locate any version of Craftcms/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.9.9), 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 CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), where the product constructs all or part of an sql command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended sql command when it is sent to a downstream component. without sufficient removal or quoting of sql syntax in user-controllable inputs, the generated sql query can cause those inputs to be interpreted as sql instead of ordinary user data. In Craftcms/cms, 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

The `ElementSearchController::actionSearch()` endpoint is missing the `unset()` protection that was added to ElementIndexesController in [GHSA-2453-mppf-46cj](https://github.com/craftcms/cms/security/advisories/GHSA-2453-mppf-46cj). The exact same SQL injection vulnerability (including `criteria[orderBy]`, the original advisory vector) works on this controller because the fix was never applied to it. Any authenticated control panel user (no admin required) can inject arbitrary SQL via `criteria[where]`, `criteria[orderBy]`, or other query properties, and extract the full database contents via boolean-based blind injection. Users should update to the patched 5.9.9 release to mitigate the issue.

CVE-2026-31858 Affected Craftcms/cms Versions

1 component(s)
Fixed Versions:
5.9.9
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/cms
 Packagist
≥ 5.0.0-RC1
< 5.9.9
5.9.9

References

GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-2453-mppf-46cj
GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-g7j6-fmwx-7vp8
NVD — CVE-2026-31858 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31858
Security Fix Commit FIX COMMIT
https://github.com/craftcms/cms/commit/e1a3dd669ae31491b86ad996e88a1d30d33d9a42
Craftcms/cms Source Repository REPOSITORY
https://github.com/craftcms/cms

Frequently Asked Questions

What is CVE-2026-31858?
CVE-2026-31858 is a security vulnerability in Craftcms/cms involving CraftCMS's `ElementSearchController` Affected by Blind SQL Injection under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection').
Which Craftcms/cms versions are affected?
Affected versions include releases prior to 5.9.9 across affected packages: craftcms/cms.
What version fixes CVE-2026-31858?
Upgrading to 5.9.9 (or the latest patched release for your respective branch) resolves the vulnerability.
Is craftcms/cms affected?
Yes, craftcms/cms is affected in releases prior to 5.9.9. Upgrade your dependency to 5.9.9 or later.
What CWE is associated with CVE-2026-31858?
CVE-2026-31858 is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.).
How can I check Packagist dependencies for CVE-2026-31858?
Run the dependency tree command: 'inspect dependencies for craftcms/cms'. 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-g7j6-fmwx-7vp8",
  "modified" : "2026-03-11T20:45:01Z",
  "published" : "2026-03-11T00:27:23Z",
  "aliases" : [ "CVE-2026-31858" ],
  "summary" : "CraftCMS's `ElementSearchController` Affected by Blind SQL Injection",
  "details" : "The `ElementSearchController::actionSearch()` endpoint is missing the `unset()` protection that\nwas added to ElementIndexesController in [GHSA-2453-mppf-46cj](https://github.com/craftcms/cms/security/advisories/GHSA-2453-mppf-46cj).\n\nThe exact same SQL injection vulnerability (including `criteria[orderBy]`, the original advisory vector) works on this controller because the fix was never applied to it.\n\nAny authenticated control panel user (no admin required) can inject arbitrary SQL via `criteria[where]`,\n`criteria[orderBy]`, or other query properties, and extract the full database contents via boolean-based blind injection.\n\nUsers should update to the patched 5.9.9 release to mitigate the issue.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0-RC1"
      }, {
        "fixed" : "5.9.9"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.9.8"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/security/advisories/GHSA-2453-mppf-46cj"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/security/advisories/GHSA-g7j6-fmwx-7vp8"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-31858"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/commit/e1a3dd669ae31491b86ad996e88a1d30d33d9a42"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-89" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-11T00:27:23Z",
    "nvd_published_at" : "2026-03-11T18:16:24Z"
  }
}