CVE-2026-32265: Craftcms/aws s3 Amazon S3 For Craft CMS Vulnerability

MODERATE
Advisory Identifier: GHSA-hwj7-4vgc-j3v9
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CWE-200
Published
Advisory Summary

CVE-2026-32265 is a MODERATE amazon s3 for craft cms vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Craftcms/aws s3 libraries in the Packagist ecosystem. The issue involves amazon s3 for craft cms has an information disclosure vulnerability. Remediation is available by upgrading affected packages to version 2.2.5.

CVE-2026-32265 at a Glance

CVE Identifier CVE-2026-32265
GHSA Identifier GHSA-hwj7-4vgc-j3v9
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Craftcms/aws s3
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-32265

To remediate this vulnerability, upgrade all affected Craftcms/aws s3 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/aws-s3 fixed: 2.2.5 
Upgrade craftcms/aws-s3 to 2.2.5
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/aws-s3

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-32265, inspect your project dependencies for Craftcms/aws s3:

inspect dependencies for craftcms/aws-s3

Analyze the terminal output to locate any version of Craftcms/aws s3 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.2.5), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Craftcms/aws s3, 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

Unauthenticated users can view a list of buckets the plugin has access to. The `BucketsController->actionLoadBucketData()` endpoint allows unauthenticated users with a valid CSRF token to view a list of buckets that the plugin is allowed to see. Users should update to version 2.2.5 of the plugin to mitigate the issue.

CVE-2026-32265 Affected Craftcms/aws s3 Versions

1 component(s)
Fixed Versions:
2.2.5
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/aws-s3
 Packagist
≥ 2.0.2
< 2.2.5
2.2.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/aws-s3/security/advisories/GHSA-hwj7-4vgc-j3v9
NVD — CVE-2026-32265 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32265
Security Fix Commit FIX COMMIT
https://github.com/craftcms/aws-s3/commit/ef8904d8b6856e4a52893a9e1e52988ae110aa3f
Craftcms/aws s3 Source Repository REPOSITORY
https://github.com/craftcms/aws-s3

Frequently Asked Questions

What is CVE-2026-32265?
CVE-2026-32265 is a security vulnerability in Craftcms/aws s3 involving Amazon S3 for Craft CMS has an Information Disclosure vulnerability under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Craftcms/aws s3 versions are affected?
Affected versions include releases prior to 2.2.5 across affected packages: craftcms/aws-s3.
What version fixes CVE-2026-32265?
Upgrading to 2.2.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is craftcms/aws-s3 affected?
Yes, craftcms/aws-s3 is affected in releases prior to 2.2.5. Upgrade your dependency to 2.2.5 or later.
What CWE is associated with CVE-2026-32265?
CVE-2026-32265 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Packagist dependencies for CVE-2026-32265?
Run the dependency tree command: 'inspect dependencies for craftcms/aws-s3'. 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-hwj7-4vgc-j3v9",
  "modified" : "2026-03-19T21:00:59Z",
  "published" : "2026-03-16T18:13:33Z",
  "aliases" : [ "CVE-2026-32265" ],
  "summary" : "Amazon S3 for Craft CMS has an Information Disclosure vulnerability",
  "details" : "Unauthenticated users can view a list of buckets the plugin has access to.\n\nThe `BucketsController->actionLoadBucketData()` endpoint allows unauthenticated users with a valid CSRF token to view a list of buckets that the plugin is allowed to see.\n\nUsers should update to version 2.2.5 of the plugin to mitigate the issue.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/aws-s3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.2"
      }, {
        "fixed" : "2.2.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.2.4"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/aws-s3/security/advisories/GHSA-hwj7-4vgc-j3v9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32265"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/aws-s3/commit/ef8904d8b6856e4a52893a9e1e52988ae110aa3f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/aws-s3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-16T18:13:33Z",
    "nvd_published_at" : "2026-03-18T04:17:27Z"
  }
}