CVE-2026-54242: Statamic/cms Statamic Vulnerable To Server-Side Request Vulnerability

MODERATE
Advisory Identifier: GHSA-v5c4-wcpj-x73m
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CVSS 4.9
CWE-367 CWE-918
Published
Advisory Summary

CVE-2026-54242 is a MODERATE (CVSS 4.9) statamic vulnerable to server-side request vulnerability (CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition) affecting Statamic/cms libraries in the Packagist ecosystem. The issue involves statamic vulnerable to server-side request forgery via glide (dns rebinding). Remediation is available by upgrading affected packages to version 5.73.24, 6.20.1.

CVE-2026-54242 at a Glance

CVE Identifier CVE-2026-54242
GHSA Identifier GHSA-v5c4-wcpj-x73m
Severity MODERATE
CVSS v3.1 Base Score 4.9
CWE Classification CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
Affected Product Statamic/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.9

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

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

How to Fix CVE-2026-54242

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: 5.73.24 
Upgrade statamic/cms to 5.73.24
statamic/cms fixed: 6.20.1 
Upgrade statamic/cms to 6.20.1
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-2026-54242, 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 5.73.24), 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-367: Time-of-check Time-of-use (TOCTOU) Race Condition, where the product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. 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 Glide image proxy's URL validation could be bypassed using DNS rebinding. The remote hostname was validated as publicly routable, but resolved again when the image was actually fetched, so an attacker controlling the hostname's DNS could rebind it to an internal address after validation. This could cause the server to make HTTP requests to internal addresses — including loopback, private network, and cloud metadata endpoints. This affects sites that pass user-supplied URLs to Glide. ### Patches This has been fixed in 5.73.24 and 6.20.1.

CVE-2026-54242 Affected Statamic/cms Versions

2 component(s)
Fixed Versions:
5.73.246.20.1
Product / Package Ecosystem Affected Versions Fixed Version
statamic/cms
 Packagist
< 5.73.24
5.73.24
statamic/cms
 Packagist
≥ 6.0.0
< 6.20.1
6.20.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/statamic/cms/security/advisories/GHSA-v5c4-wcpj-x73m
Statamic/cms Source Repository REPOSITORY
https://github.com/statamic/cms

Frequently Asked Questions

What is CVE-2026-54242?
CVE-2026-54242 is a security vulnerability in Statamic/cms involving Statamic Vulnerable to Server-Side Request Forgery via Glide (DNS rebinding) under CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition.
Which Statamic/cms versions are affected?
Affected versions include releases prior to 5.73.24, 6.20.1 across affected packages: statamic/cms.
What version fixes CVE-2026-54242?
Upgrading to 5.73.24, 6.20.1 (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 5.73.24, 6.20.1. Upgrade your dependency to 5.73.24, 6.20.1 or later.
What is the CVSS score of CVE-2026-54242?
CVE-2026-54242 has a CVSS v3.1 base score of 4.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-54242?
CVE-2026-54242 is classified under CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition (The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.).
How can I check Packagist dependencies for CVE-2026-54242?
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-v5c4-wcpj-x73m",
  "modified" : "2026-06-26T23:03:29Z",
  "published" : "2026-06-26T23:03:28Z",
  "aliases" : [ "CVE-2026-54242" ],
  "summary" : "Statamic Vulnerable to Server-Side Request Forgery via Glide (DNS rebinding)",
  "details" : "### Impact\n\nThe Glide image proxy's URL validation could be bypassed using DNS rebinding. The remote hostname was validated as publicly routable, but resolved again when the image was actually fetched, so an attacker controlling the hostname's DNS could rebind it to an internal address after validation. This could cause the server to make HTTP requests to internal addresses — including loopback, private network, and cloud metadata endpoints.\n\nThis affects sites that pass user-supplied URLs to Glide.\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:H/PR:L/UI:N/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.73.24"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "statamic/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "fixed" : "6.20.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/statamic/cms/security/advisories/GHSA-v5c4-wcpj-x73m"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/statamic/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-367", "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-26T23:03:28Z",
    "nvd_published_at" : null
  }
}