{"id":"CVE-2026-35366","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-35366","generatedAt":"2026-10-28T02:13:13.865Z","title":"While POSIX permits arbitrary bytes in environment strings, the uutils implementation silently skips these entries rather than printing the raw bytes.","description":"The printenv utility in uutils coreutils fails to display environment variables containing invalid UTF-8 byte sequences. While POSIX permits arbitrary bytes in environment strings, the uutils implementation silently skips these entries rather than printing the raw bytes. This vulnerability allows malicious environment variables (e.g., adversarial LD_PRELOAD values) to evade inspection by administrators or security auditing tools, potentially allowing library injection or other environment-based attacks to go undetected.","published":"2026-04-22T17:16:40.000Z","lastModified":"2026-10-26T22:10:00.000Z","status":"Analyzed","sourceIdentifier":"security@ubuntu.com","cvss":{"version":"3.1","score":4.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"cwe":["CWE-754"],"affected":["uutils/coreutils"],"epss":{"score":0.0017,"percentile":0.06401,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/uutils/coreutils/issues/9701","tags":["Exploit","Issue Tracking"],"source":"security@ubuntu.com"},{"url":"https://github.com/uutils/coreutils/pull/9728","tags":["Issue Tracking","Patch"],"source":"security@ubuntu.com"},{"url":"https://github.com/uutils/coreutils/releases/tag/0.6.0","tags":["Release Notes"],"source":"security@ubuntu.com"},{"url":"https://github.com/uutils/coreutils/issues/9701","tags":["Exploit","Issue Tracking"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-35366","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."}