---
id: CVE-2026-77055
title: Improper Privilege Assignment in boneIO
summary: >-
  boneIO black_debian_images gives the boneio service account excessive
  privileges, including full passwordless sudo access and membership in the
  docker group. A local attacker who compromises the boneio user can use these
  privileges to es…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cvssSource: cna
cwe:
  - CWE-266
vendor: boneIO
product: black_debian_images
affected:
  - black_debian_images >= 1.2.0 < 1.6.0
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T14:45:49.260Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-77055'
references:
  - url: 'https://cert.pl/en/posts/2026/10/CVE-2026-77052'
  - url: 'https://boneio.eu/en/docs/black'
tags:
  - cve.org
ingestedAt: '2026-10-26T15:29:30.510Z'
epss: 0.00093
epssPercentile: 0.00527
---

## Overview

boneIO black_debian_images gives the boneio service account excessive privileges, including full passwordless sudo access and membership in the docker group. A local attacker who compromises the boneio user can use these privileges to escalate to root.

This issue was fixed in version 1.6.0: the image removes the sudoers rule and the docker group membership when it is sealed, and devices already in the field have both removed by migrations shipped with boneio 1.6.0 and applied on first start after the upgrade. Privileged operations now go through helpers that accept only a fixed set of commands, with migrations verified against Ed25519 signatures.

## Affected

- `black_debian_images >= 1.2.0 < 1.6.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.