CVE-2026-28423: Statamic/cms Statamic Vulnerable To Server-Side Request Vulnerability

MODERATE
Advisory Identifier: GHSA-cwpp-325q-2cvp
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CVSS 6.8
CWE-918
Published
Advisory Summary

CVE-2026-28423 is a MODERATE (CVSS 6.8) statamic vulnerable to server-side request vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Statamic/cms libraries in the Packagist ecosystem. The issue involves statamic vulnerable to server-side request forgery via glide. Remediation is available by upgrading affected packages to version 5.73.11, 6.4.0.

CVE-2026-28423 at a Glance

CVE Identifier CVE-2026-28423
GHSA Identifier GHSA-cwpp-325q-2cvp
Severity MODERATE
CVSS v3.1 Base Score 6.8
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Statamic/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.8

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

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

How to Fix CVE-2026-28423

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: 5.73.11 
Upgrade statamic/cms to 5.73.11
statamic/cms fixed: 6.4.0 
Upgrade statamic/cms to 6.4.0
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 statamic/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-28423, 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 5.73.11), 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-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. 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 When Glide image manipulation is used in insecure mode (which is *not* the default), the image proxy can be abused by an unauthenticated user to make the server send HTTP requests to arbitrary URLs—either via the URL directly or via the watermark feature. That can allow access to internal services, cloud metadata endpoints, and other hosts reachable from the server. ## Patches This has been fixed in 5.73.11 and 6.4.0.

CVE-2026-28423 Affected Statamic/cms Versions

2 component(s)
Fixed Versions:
5.73.116.4.0
Product / Package Ecosystem Affected Versions Fixed Version
statamic/cms
 Packagist
< 5.73.11
5.73.11
statamic/cms
 Packagist
≥ 6.0.0-alpha.1
< 6.4.0
6.4.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/statamic/cms/security/advisories/GHSA-cwpp-325q-2cvp
NVD — CVE-2026-28423 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28423
Statamic/cms Source Repository REPOSITORY
https://github.com/statamic/cms
Statamic/cms Release RELEASE
https://github.com/statamic/cms/releases/tag/v5.73.11
Statamic/cms Release RELEASE
https://github.com/statamic/cms/releases/tag/v6.4.0

Frequently Asked Questions

What is CVE-2026-28423?
CVE-2026-28423 is a security vulnerability in Statamic/cms involving Statamic Vulnerable to Server-Side Request Forgery via Glide under CWE-918: Server-Side Request Forgery (SSRF).
Which Statamic/cms versions are affected?
Affected versions include releases prior to 5.73.11, 6.4.0 across affected packages: statamic/cms.
What version fixes CVE-2026-28423?
Upgrading to 5.73.11, 6.4.0 (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 5.73.11, 6.4.0. Upgrade your dependency to 5.73.11, 6.4.0 or later.
What is the CVSS score of CVE-2026-28423?
CVE-2026-28423 has a CVSS v3.1 base score of 6.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N.
What CWE is associated with CVE-2026-28423?
CVE-2026-28423 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Packagist dependencies for CVE-2026-28423?
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-cwpp-325q-2cvp",
  "modified" : "2026-03-01T01:30:24Z",
  "published" : "2026-03-01T01:30:24Z",
  "aliases" : [ "CVE-2026-28423" ],
  "summary" : "Statamic Vulnerable to Server-Side Request Forgery via Glide",
  "details" : "### Impact\n\nWhen Glide image manipulation is used in insecure mode (which is *not* the default), the image proxy can be abused by an unauthenticated user to make the server send HTTP requests to arbitrary URLs—either via the URL directly or via the watermark feature. That can allow access to internal services, cloud metadata endpoints, and other hosts reachable from the server.\n\n\n## Patches\n\nThis has been fixed in 5.73.11 and 6.4.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.73.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0-alpha.1"
      }, {
        "fixed" : "6.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/statamic/cms/security/advisories/GHSA-cwpp-325q-2cvp"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-28423"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/statamic/cms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/statamic/cms/releases/tag/v5.73.11"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/statamic/cms/releases/tag/v6.4.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-01T01:30:24Z",
    "nvd_published_at" : "2026-02-27T23:16:05Z"
  }
}