CVE-2026-77059Published

TOCTOU Race Condition in boneIO

Exact source revision recorded 26 Oct 2026 16:35:30 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-77059

Published

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.

Source published: 26 Oct 2026 14:46:02 UTC
Source modified: 26 Oct 2026 15:35:50 UTC
Observed here: 26 Oct 2026 16:35:30 UTC
Source terms: CVE Program Terms of Use

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CVSS 4.0 · 8.8 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H