{"id":"CVE-2026-109428","title":"Mistral Vibe before 2.25.5 contains a permission validation bypass vulnerability that allows attackers to execute unauthorized commands by exploiting a parsing discrepancy between tree-sitter-bash and bash in handling backslash-newline l…","summary":"Mistral Vibe before 2.25.5 contains a permission validation bypass vulnerability that allows attackers to execute unauthorized commands by exploiting a parsing discrepancy between tree-sitter-bash and bash in handling backslash-newline l…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-436"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T19:30:29.797","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109428","references":[{"url":"https://github.com/mistralai/mistral-vibe/commit/c069ffa1e12fb5f2487b489217c40ab97721d553","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mistralai/mistral-vibe/pull/1111","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mistralai/mistral-vibe/releases/tag/v2.25.5","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/mistral-vibe-permission-bypass-via-bash-line-continuation","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-13T19:43:28.931Z","slug":"CVE-2026-109428","body":"## Overview\n\nMistral Vibe before 2.25.5 contains a permission validation bypass vulnerability that allows attackers to execute unauthorized commands by exploiting a parsing discrepancy between tree-sitter-bash and bash in handling backslash-newline line continuations in the _extract_commands() function of bash.py. Attackers can craft a command string where tree-sitter-bash extracts only an allowlisted prefix such as cd while bash joins the line continuation into a materially different and hidden command such as a curl request, causing resolve_permission to grant ALWAYS permission while bash executes unauthorized arbitrary commands.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}