CVE-2026-33882: Statamic/cms Statamic's Markdown Preview Endpoint Exposes Vulnerability

MODERATE
Advisory Identifier: GHSA-cvh3-23vq-w7h4
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CVSS 6.5
CWE-20 CWE-200
Published
Advisory Summary

CVE-2026-33882 is a MODERATE (CVSS 6.5) statamic's markdown preview endpoint exposes vulnerability (CWE-20: Improper Input Validation) affecting Statamic/cms libraries in the Packagist ecosystem. The issue involves statamic's markdown preview endpoint exposes sensitive user data. Remediation is available by upgrading affected packages to version 5.73.16, 6.7.2.

CVE-2026-33882 at a Glance

CVE Identifier CVE-2026-33882
GHSA Identifier GHSA-cvh3-23vq-w7h4
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Statamic/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

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

How to Fix CVE-2026-33882

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: 5.73.16 
Upgrade statamic/cms to 5.73.16
statamic/cms fixed: 6.7.2 
Upgrade statamic/cms to 6.7.2
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-2026-33882, 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 5.73.16), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. 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 The markdown preview endpoint could be manipulated to return augmented data from arbitrary fieldtypes. With the users fieldtype specifically, an authenticated control panel user could retrieve sensitive user data including email addresses, encrypted passkey data, and encrypted two-factor authentication codes. ### Patches This has been fixed in 5.73.16 and 6.7.2.

CVE-2026-33882 Affected Statamic/cms Versions

2 component(s)
Fixed Versions:
5.73.166.7.2
Product / Package Ecosystem Affected Versions Fixed Version
statamic/cms
 Packagist
< 5.73.16
5.73.16
statamic/cms
 Packagist
≥ 6.0.0-alpha.1
< 6.7.2
6.7.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/statamic/cms/security/advisories/GHSA-cvh3-23vq-w7h4
NVD — CVE-2026-33882 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33882
Statamic/cms Source Repository REPOSITORY
https://github.com/statamic/cms

Frequently Asked Questions

What is CVE-2026-33882?
CVE-2026-33882 is a security vulnerability in Statamic/cms involving Statamic's Markdown preview endpoint exposes sensitive user data under CWE-20: Improper Input Validation.
Which Statamic/cms versions are affected?
Affected versions include releases prior to 5.73.16, 6.7.2 across affected packages: statamic/cms.
What version fixes CVE-2026-33882?
Upgrading to 5.73.16, 6.7.2 (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 5.73.16, 6.7.2. Upgrade your dependency to 5.73.16, 6.7.2 or later.
What is the CVSS score of CVE-2026-33882?
CVE-2026-33882 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-33882?
CVE-2026-33882 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Packagist dependencies for CVE-2026-33882?
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-cvh3-23vq-w7h4",
  "modified" : "2026-03-27T21:49:52Z",
  "published" : "2026-03-26T19:03:04Z",
  "aliases" : [ "CVE-2026-33882" ],
  "summary" : "Statamic's Markdown preview endpoint exposes sensitive user data",
  "details" : "### Impact\nThe markdown preview endpoint could be manipulated to return augmented data from arbitrary fieldtypes. With the users fieldtype specifically, an authenticated control panel user could retrieve sensitive user data including email addresses, encrypted passkey data, and encrypted two-factor authentication codes.\n\n### Patches\nThis has been fixed in 5.73.16 and 6.7.2.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.73.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0-alpha.1"
      }, {
        "fixed" : "6.7.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/statamic/cms/security/advisories/GHSA-cvh3-23vq-w7h4"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33882"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/statamic/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-26T19:03:04Z",
    "nvd_published_at" : "2026-03-27T21:17:24Z"
  }
}