Auth bypass in Bootimus
CVE-2026-56115
Bootimus through 0.1.70 contains a broken access control vulnerability that allows authenticated low-privileged users to perform administrative actions by exploiting missing role enforcement in the JWTMiddleware function in internal/auth/auth.go, which validates JWT tokens and account status but fails to inspect the is_admin flag. Attackers can send requests to any endpoint under the /api/users path to create new administrator accounts or reset administrator passwords, thereby gaining full control of the server and the ability to modify boot menus and installation scripts served to PXE clients.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (38.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Bootimus
- Dhcpcd Project
- Garybowers Bootimus — versions 0
- Networkconfiguration Dhcpcd — versions 0, 2f00c7bfc408b6582d331932dfa47829c4819029
Weakness classification (CWE)
References
- github.com/NetworkConfiguration/dhcpcd/commit/2f00c7bfc408b6582d331932dfa47829c… (patch)
- www.vulncheck.com/advisories/dhcpcd-stack-out-of-bounds-write-in-dhcp6-makemess… (third-party-advisory)
- github.com/garybowers/bootimus/issues/84 (Exploit, technical-description, exploit, Issue Tracking, Vendor Advisory)
- www.vulncheck.com/advisories/bootimus-broken-access-control-via-jwtmiddleware-a… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56115?
- CVE-2026-56115 is a high-severity vulnerability in Bootimus, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-06-23.
- How severe is CVE-2026-56115?
- High severity. CVSS v3 base score is 8.8 out of 10.