Auth bypass in Makunet Maku-Boot
CVE-2026-110123
Makunet maku-boot 4.3.0 through 5.0.0 contains a missing authorization vulnerability that allows authenticated users to read mail and SMS configurations by calling /sys/mail/config/list and /sys/sms/config/list without the required authority checks. Attackers can retrieve unmasked SMTP passwords and Aliyun, Tencent Cloud, Qiniu or Huawei Cloud access keys, and abuse /sys/mail/config/send to send mail to arbitrary recipients.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/maku-boot-mail-sms-config-bfla (third-party-advisory)
- github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku… (technical-description)
- github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku… (technical-description)
- github.com/makunet/maku-boot/blob/4cd202b037e2ac47e366d4b0691fb387c764d308/maku… (technical-description)
- github.com/makunet/maku-boot/releases/tag/v5.0.0 (release-notes)
- www.vulncheck.com/advisories/makunet-maku-boot-4.3.0-through-5.0.0-missing-auth… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110123?
- CVE-2026-110123 is a high-severity vulnerability in Makunet Maku-Boot, classified under Missing Authorization. CVSS score: 7.1/10. Published 2026-10-13.
- How severe is CVE-2026-110123?
- High severity. CVSS v3 base score is 7.1 out of 10.