CVE-2026-77059

boneIO Black contains a TOCTOU race condition in the create_timedatectl_sudoers_file() function in boneio/webui/routes/timezone_sudoers.py. The function writes sudoers rules to a predictable temporary file, validates them, then installs them with root privileges. A local attacker can exploit the race window between validation and installation to substitute malicious content, or use the predictable filename for symlink attacks, resulting in arbitrary sudoers rule injection and local privilege escalation to root. This issue was fixed in version 1.6.0.

CVSS

No CVSS.

References

Link	Resource
https://boneio.eu/en/docs/black
https://cert.pl/en/posts/2026/10/CVE-2026-77052

Configurations

No configuration.

History

26 Oct 2026, 15:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-26 15:16

Updated : 2026-10-26 17:11

NVD link : CVE-2026-77059

Mitre link : CVE-2026-77059

CVE.ORG link : CVE-2026-77059

JSON object : View

Products Affected

No product.

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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