CVE-2026-56115

Publication date 23 June 2026

Last updated 24 September 2026

Ubuntu priority

Cvss 3 Severity Score

Description

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
dhcpcd	26.04 LTS resolute	Not affected
	25.10 questing	Ignored end of life, was not-affected (see notes)
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release

Notes

mdeslaur

This CVE is for something called Bootimus, not dhcpcd

Severity score breakdown

CVSS version:

Base score 8.7 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Attack requirements	None
Privileges required	Low
User interaction	None
Vulnerable system - Confidentiality impact	High
Vulnerable system - Integrity impact	High
Vulnerable system - Availability impact	High
Subsequent system - Confidentiality impact	None
Subsequent system - Integrity impact	None
Subsequent system - Availability impact	None

Scores

Parameter	Value
Base score	8.7 · High
Base + Threat score	-
Base + Environmental score	-
Base + Threat + Environmental score	-

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Base score 8.8 · High