---
title: "CVE-2026-110123: Makunet maku-boot - Broken Access Control"
description: "Makunet maku-boot 4.3.0 through 5.0.0 contains a missing authorization vulnerability caused by lack of authority checks in /sys/mail/config/list and /sys/sms/config/list, letting authenticated users read sensitive mail and SMS configurations and send mail to arbitrary recipients, exploit requires user authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-110123/
---

# CVE-2026-110123 Makunet maku-boot - Broken Access Control

Makunet maku-boot 4.3.0 through 5.0.0 contains a missing authorization vulnerability caused by lack of authority checks in /sys/mail/config/list and /sys/sms/config/list, letting authenticated users read sensitive mail and SMS configurations and send mail to arbitrary recipients, exploit requires user authentication.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.28% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-110123)

## Details

Type

Broken Access Control

Impact

Information Disclosure

CVSS vector

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

Published

13 October 2026

Updated

15 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## Vendor fix

Update to a version later than 5.0.0 or apply patches that enforce proper authorization checks.

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-2026-110123](https://nvd.nist.gov/vuln/detail/CVE-2026-110123)
- [https://github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku-boot-system/src/main/java/net/maku/system/controller/SysSmsConfigController.java#L53-L59](https://github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku-boot-system/src/main/java/net/maku/system/controller/SysSmsConfigController.java#L53-L59)
- [https://github.com/makunet/maku-boot/releases/tag/v5.0.0](https://github.com/makunet/maku-boot/releases/tag/v5.0.0)
- [https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/maku-boot-mail-sms-config-bfla](https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/maku-boot-mail-sms-config-bfla)
- [https://www.vulncheck.com/advisories/makunet-maku-boot-4.3.0-through-5.0.0-missing-authorization-via-mail-and-sms-config-endpoints](https://www.vulncheck.com/advisories/makunet-maku-boot-4.3.0-through-5.0.0-missing-authorization-via-mail-and-sms-config-endpoints)
- [https://github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku-boot-system/src/main/java/net/maku/system/controller/SysMailConfigController.java#L53-L59](https://github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku-boot-system/src/main/java/net/maku/system/controller/SysMailConfigController.java#L53-L59)
- [https://github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku-boot-system/src/main/java/net/maku/system/controller/SysMailConfigController.java#L79-L84](https://github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku-boot-system/src/main/java/net/maku/system/controller/SysMailConfigController.java#L79-L84)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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