CVE-2026-46721: Evoweb/sf register TYPO3 Sf_register Extension Allows Unauthorized Vulnerability

MODERATE
Advisory Identifier: GHSA-v348-vr4q-fv9p
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CWE-639
Published
Advisory Summary

CVE-2026-46721 is a MODERATE typo3 sf_register extension allows unauthorized vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Evoweb/sf register libraries in the Packagist ecosystem. The issue involves typo3 sf_register extension allows unauthorized assignment of frontend user groups. Remediation is available by upgrading affected packages to version 14.0.2, 13.2.4.

CVE-2026-46721 at a Glance

CVE Identifier CVE-2026-46721
GHSA Identifier GHSA-v348-vr4q-fv9p
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
Affected Product Evoweb/sf register
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-46721

To remediate this vulnerability, upgrade all affected Evoweb/sf register dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

evoweb/sf-register fixed: 14.0.2 
Upgrade evoweb/sf-register to 14.0.2
evoweb/sf-register fixed: 13.2.4 
Upgrade evoweb/sf-register to 13.2.4
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 evoweb/sf-register

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-46721, inspect your project dependencies for Evoweb/sf register:

inspect dependencies for evoweb/sf-register

Analyze the terminal output to locate any version of Evoweb/sf register in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 14.0.2), 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-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. In Evoweb/sf register, 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

The `create` and `edit` flows in the TYPO3 extension sf_register do not restrict which user properties may be submitted, and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

CVE-2026-46721 Affected Evoweb/sf register Versions

2 component(s)
Fixed Versions:
14.0.213.2.4
Product / Package Ecosystem Affected Versions Fixed Version
evoweb/sf-register
 Packagist
≥ 14.0.0
< 14.0.2
14.0.2
evoweb/sf-register
 Packagist
< 13.2.4
13.2.4

References

NVD — CVE-2026-46721 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46721
Evoweb/sf register Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/evoweb/sf-register/CVE-2026-46721.yaml
Evoweb/sf register Source Repository REPOSITORY
https://github.com/evoWeb/sf_register
Evoweb/sf register Security Information SECURITY
https://typo3.org/security/advisory/typo3-ext-sa-2026-009

Frequently Asked Questions

What is CVE-2026-46721?
CVE-2026-46721 is a security vulnerability in Evoweb/sf register involving TYPO3 sf_register extension allows unauthorized assignment of frontend user groups under CWE-639: Authorization Bypass Through User-Controlled Key.
Which Evoweb/sf register versions are affected?
Affected versions include releases prior to 14.0.2, 13.2.4 across affected packages: evoweb/sf-register.
What version fixes CVE-2026-46721?
Upgrading to 14.0.2, 13.2.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is evoweb/sf-register affected?
Yes, evoweb/sf-register is affected in releases prior to 14.0.2, 13.2.4. Upgrade your dependency to 14.0.2, 13.2.4 or later.
What CWE is associated with CVE-2026-46721?
CVE-2026-46721 is classified under CWE-639: Authorization Bypass Through User-Controlled Key (The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.).
How can I check Packagist dependencies for CVE-2026-46721?
Run the dependency tree command: 'inspect dependencies for evoweb/sf-register'. 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-v348-vr4q-fv9p",
  "modified" : "2026-06-29T22:58:05Z",
  "published" : "2026-05-19T12:31:39Z",
  "aliases" : [ "CVE-2026-46721" ],
  "summary" : "TYPO3 sf_register extension allows unauthorized assignment of frontend user groups",
  "details" : "The `create` and `edit` flows in the TYPO3 extension sf_register do not restrict which user properties may be submitted, and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "evoweb/sf-register"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "14.0.0"
      }, {
        "fixed" : "14.0.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "evoweb/sf-register"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "13.2.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-46721"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/evoweb/sf-register/CVE-2026-46721.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/evoWeb/sf_register"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-ext-sa-2026-009"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-639" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-29T22:58:05Z",
    "nvd_published_at" : "2026-05-19T10:16:24Z"
  }
}