{"id":"CVE-2026-109428","aliases":[],"cve":{"records":[{"id":"CVE-2026-109428","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-12T15:52:36.682Z","published":"2026-10-13T18:17:05.062Z","modified":"2026-10-26T19:25:04.692Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-13T18:24:09.736Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-26T19:25:04.692Z"}],"references":[{"url":"https://github.com/mistralai/mistral-vibe/releases/tag/v2.25.5","tags":["release-notes"],"source":"VulnCheck"},{"url":"https://github.com/mistralai/mistral-vibe/pull/1111","tags":["issue-tracking","patch"],"source":"VulnCheck"},{"url":"https://github.com/mistralai/mistral-vibe/commit/c069ffa1e12fb5f2487b489217c40ab97721d553","tags":["patch","issue-tracking"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/mistral-vibe-permission-bypass-via-bash-line-continuation","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-436","description":"Interpretation Conflict","source":"VulnCheck"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-26T19:24:29.486443Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Mistral Vibe < 2.25.5 Permission Bypass via Bash Line Continuation","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"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 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commands.","score":8.8,"severity":"high","published":"2026-10-13T18:17:05.062Z","modified":"2026-10-26T19:25:04.692Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"mistralai","name":"mistral-vibe","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"2.25.5","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:github/mistralai/mistral-vibe","cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-109428"}],"remediation":[],"references":["https://github.com/mistralai/mistral-vibe/releases/tag/v2.25.5","https://github.com/mistralai/mistral-vibe/pull/1111","https://github.com/mistralai/mistral-vibe/commit/c069ffa1e12fb5f2487b489217c40ab97721d553","https://www.vulncheck.com/advisories/mistral-vibe-permission-bypass-via-bash-line-continuation"],"sources":[{"name":"CVE","id":"CVE-2026-109428","modified":"2026-10-26T19:25:04.692Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-109428"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8}],"sourceAffected":[],"observedAt":"2026-10-29T14:27:15.152Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T10:20:31.211Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"Mistral Vibe before 2.25.5 has a permission validation bypass vulnerability, allowing attackers to execute unauthorized commands by exploiting a parsing discrepancy in handling backslash-newline line continuations. Attackers can craft a command string to grant ALWAYS permission while executing arbitrary commands. Local access is required.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:12:26.139Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-109428"}]}}