{"id":"CVE-2026-77059","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77059","generatedAt":"2026-10-28T00:53:39.974Z","title":"boneIO Black contains a TOCTOU race condition in the create_timedatectl_sudoers_file() function in boneio/webui/routes/timezone_sudoers.py.","description":"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.\n\nThis issue was fixed in version 1.6.0.","published":"2026-10-26T15:16:44.000Z","lastModified":"2026-10-26T17:11:35.000Z","status":"Deferred","sourceIdentifier":"cvd@cert.pl","cvss":{"version":"4.0","score":8.8,"severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-367"],"affected":[],"epss":null,"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unscored. Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-26T15:16:44.000Z","detail":{"score":"8.8","severity":"HIGH","publishedAt":"2026-10-26T15:16:43.787Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://boneio.eu/en/docs/black","source":"cvd@cert.pl"},{"url":"https://cert.pl/en/posts/2026/10/CVE-2026-77052","source":"cvd@cert.pl"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77059","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}