CVE-2026-56115

HIGH

dhcpcd Stack Out-of-Bounds Write in dhcp6_makemessage()

Title source: cna
STIX 2.1

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.

Scores

CVSS v3 8.8
EPSS 0.0030
EPSS Percentile 21.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (3)
garybowers/bootimus < 0.1.70
NetworkConfiguration/dhcpcd < 10.3.2
NetworkConfiguration/dhcpcd 2f00c7bfc408b6582d331932dfa47829c4819029
Published Jun 23, 2026
Tracked Since Jun 23, 2026