CVE-2026-77059: high-severity vulnerability in boneIO
TOCTOU Race Condition in boneIO
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.1%
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:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
boneIO · boneIORelated CVEs — boneIO
In the same product, most dangerous first.
CVE-2026-77062MEDIUMClickjacking in boneIOEPSS 0.5%CVE-2026-77061MEDIUMMissing Authentication for Critical Function in boneIOEPSS 0.3%CVE-2026-77052HIGHMissing Authentication for Node-RED in boneIOEPSS 0.3%CVE-2026-77057LOWImproper Restriction of Excessive Authentication Attempts in boneIOEPSS 0.3%CVE-2026-77058MEDIUMCross-Site Request Forgery (CSRF) in boneIOEPSS 0.3%CVE-2026-77053HIGHMissing Authentication in Default Configuration in boneIOEPSS 0.3%