Vulnerability · Published Oct 26, 2026 · Assigned by CERT-PL

CVE-2026-77055Improper Privilege Assignment in boneIO

Critical 9.3

In plain English

A critical-severity security flaw in black_debian_images from boneIO. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)<0.1%top 99.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
boneIO	black_debian_images	1.2.0 – before 1.6.0

Weakness: CWE-266 · Vector: 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

References

https://cert.pl/en/posts/2026/10/CVE-2026-77052 third-party-advisory
https://boneio.eu/en/docs/black product