CVE-2026-41232
Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index that Allows Cross-Customer Email Spoofing
Description
Froxlor is open source server administration software. Prior to version 2.3.6, in `EmailSender::add()`, the domain ownership validation for full email sender aliases uses the wrong array index when splitting the email address, passing the local part instead of the domain to `validateLocalDomainOwnership()`. This causes the ownership check to always pass for non-existent "domains," allowing any authenticated customer to add sender aliases for email addresses on domains belonging to other customers. Postfix's `sender_login_maps` then authorizes the attacker to send emails as those addresses. Version 2.3.6 fixes the issue.
INFO
Published Date :
April 23, 2026, 5:16 a.m.
Last Modified :
April 27, 2026, 5:02 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Froxlor to version 2.3.6 or later.
- Verify email sender alias configurations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41232.
| URL | Resource |
|---|---|
| https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a | Patch |
| https://github.com/froxlor/froxlor/releases/tag/2.3.6 | Release Notes |
| https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 | Exploit Vendor Advisory Mitigation |
| https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 | Exploit Vendor Advisory Mitigation |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41232 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41232
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41232 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41232 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:* versions up to (excluding) 2.3.6 Added Reference Type GitHub, Inc.: https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a Types: Patch Added Reference Type GitHub, Inc.: https://github.com/froxlor/froxlor/releases/tag/2.3.6 Types: Release Notes Added Reference Type CISA-ADP: https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 Types: Exploit, Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 23, 2026
Action Type Old Value New Value Added Reference https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 -
New CVE Received by [email protected]
Apr. 23, 2026
Action Type Old Value New Value Added Description Froxlor is open source server administration software. Prior to version 2.3.6, in `EmailSender::add()`, the domain ownership validation for full email sender aliases uses the wrong array index when splitting the email address, passing the local part instead of the domain to `validateLocalDomainOwnership()`. This causes the ownership check to always pass for non-existent "domains," allowing any authenticated customer to add sender aliases for email addresses on domains belonging to other customers. Postfix's `sender_login_maps` then authorizes the attacker to send emails as those addresses. Version 2.3.6 fixes the issue. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N Added CWE CWE-863 Added Reference https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a Added Reference https://github.com/froxlor/froxlor/releases/tag/2.3.6 Added Reference https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6