---
title: "CVE-2026-100718: Froxlor - Broken Access Control"
description: "Froxlor <= 2.3.10 contains a broken access control vulnerability caused by improper enforcement of mail.allow_external_domains policy in EmailSender.add API, letting authenticated customers bypass sender restrictions and spoof external sender identities."
url: https://panop.io/threat-heartbeat/CVE-2026-100718/
---

# CVE-2026-100718 Froxlor - Broken Access Control

Froxlor <= 2.3.10 contains a broken access control vulnerability caused by improper enforcement of mail.allow\_external\_domains policy in EmailSender.add API, letting authenticated customers bypass sender restrictions and spoof external sender identities.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.19% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100718)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Published

26 September 2026

Updated

15 October 2026

Weakness

[CWE-276](https://cwe.mitre.org/data/definitions/276.html)

## Vendor fix

Upgrade to version 2.3.12 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100718](https://nvd.nist.gov/vuln/detail/CVE-2026-100718)
- [https://github.com/froxlor/froxlor/security/advisories/GHSA-m9j6-9856-68xf](https://github.com/froxlor/froxlor/security/advisories/GHSA-m9j6-9856-68xf)
- [https://www.vulncheck.com/advisories/froxlor-before-2.3.12-authentication-bypass-via-emailsender-add](https://www.vulncheck.com/advisories/froxlor-before-2.3.12-authentication-bypass-via-emailsender-add)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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