CVE-2026-54243: Statamic/cms Statamic Vulnerable To CSV Formula Vulnerability

MODERATE
Advisory Identifier: GHSA-h77m-qrj7-jxcw
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CVSS 6.1
CWE-1236
Published
Advisory Summary

CVE-2026-54243 is a MODERATE (CVSS 6.1) statamic vulnerable to csv formula vulnerability (CWE-1236: Improper Neutralization of Formula Elements in a CSV File) affecting Statamic/cms libraries in the Packagist ecosystem. The issue involves statamic vulnerable to csv formula injection in form submission exports. Remediation is available by upgrading affected packages to version 6.20.1, 5.73.24.

CVE-2026-54243 at a Glance

CVE Identifier CVE-2026-54243
GHSA Identifier GHSA-h77m-qrj7-jxcw
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-1236: Improper Neutralization of Formula Elements in a CSV File
Affected Product Statamic/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-54243

To remediate this vulnerability, upgrade all affected Statamic/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.

statamic/cms fixed: 6.20.1 
Upgrade statamic/cms to 6.20.1
statamic/cms fixed: 5.73.24 
Upgrade statamic/cms to 5.73.24
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 statamic/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-54243, inspect your project dependencies for Statamic/cms:

inspect dependencies for statamic/cms

Analyze the terminal output to locate any version of Statamic/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.20.1), 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-1236: Improper Neutralization of Formula Elements in a CSV File, where the product saves user-provided information into a comma-separated value (csv) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product. In Statamic/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

### Impact Form submission values were not neutralized for spreadsheet formula characters when exported to CSV. A submission containing a value beginning with a formula trigger character (e.g.  = ,  + ,  - ,  @ ) could be interpreted as a live formula when a Control Panel user opens the export in a spreadsheet application. Form submissions can come from unauthenticated front-end visitors, so the malicious value can be supplied by an anonymous user and is later triggered by an editor opening the export. Exploitation affects the spreadsheet application used to open the export, not the Statamic application or server; the data at risk is the form submission data the exporting user is already authorized to view. ### Patches This has been fixed in 5.73.24 and 6.20.1.

CVE-2026-54243 Affected Statamic/cms Versions

2 component(s)
Fixed Versions:
6.20.15.73.24
Product / Package Ecosystem Affected Versions Fixed Version
statamic/cms
 Packagist
≥ 6.0.0
< 6.20.1
6.20.1
statamic/cms
 Packagist
< 5.73.24
5.73.24

References

GitHub Advisory / Wiki ADVISORY
https://github.com/statamic/cms/security/advisories/GHSA-h77m-qrj7-jxcw
Statamic/cms Source Repository REPOSITORY
https://github.com/statamic/cms

Frequently Asked Questions

What is CVE-2026-54243?
CVE-2026-54243 is a security vulnerability in Statamic/cms involving Statamic Vulnerable to CSV formula injection in form submission exports under CWE-1236: Improper Neutralization of Formula Elements in a CSV File.
Which Statamic/cms versions are affected?
Affected versions include releases prior to 6.20.1, 5.73.24 across affected packages: statamic/cms.
What version fixes CVE-2026-54243?
Upgrading to 6.20.1, 5.73.24 (or the latest patched release for your respective branch) resolves the vulnerability.
Is statamic/cms affected?
Yes, statamic/cms is affected in releases prior to 6.20.1, 5.73.24. Upgrade your dependency to 6.20.1, 5.73.24 or later.
What is the CVSS score of CVE-2026-54243?
CVE-2026-54243 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-54243?
CVE-2026-54243 is classified under CWE-1236: Improper Neutralization of Formula Elements in a CSV File (The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product.).
How can I check Packagist dependencies for CVE-2026-54243?
Run the dependency tree command: 'inspect dependencies for statamic/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-h77m-qrj7-jxcw",
  "modified" : "2026-06-26T23:03:56Z",
  "published" : "2026-06-26T23:03:56Z",
  "aliases" : [ "CVE-2026-54243" ],
  "summary" : "Statamic Vulnerable to CSV formula injection in form submission exports",
  "details" : "### Impact\n\nForm submission values were not neutralized for spreadsheet formula characters when exported to CSV. A submission containing a value beginning with a formula trigger character (e.g.  = ,  + ,  - ,  @ ) could be interpreted as a live formula when a Control Panel user opens the export in a spreadsheet application. Form submissions can come from unauthenticated front-end visitors, so the malicious value can be supplied by an anonymous user and is later triggered by an editor opening the export.\n\nExploitation affects the spreadsheet application used to open the export, not the Statamic application or server; the data at risk is the form submission data the exporting user is already authorized to view.\n\n\n### Patches\n\nThis has been fixed in 5.73.24 and 6.20.1.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "fixed" : "6.20.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.73.24"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/statamic/cms/security/advisories/GHSA-h77m-qrj7-jxcw"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/statamic/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1236" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-26T23:03:56Z",
    "nvd_published_at" : null
  }
}