{"id":"CVE-2026-87984","title":"An arbitrary file write vulnerability in Mistral Vibe, introduced in version 1.3.4, allows an attacker to create or overwrite files outside the active workspace without user approval","summary":"An arbitrary file write vulnerability in Mistral Vibe, introduced in version 1.3.4, allows an attacker to create or overwrite files outside the active workspace without user approval. Shell redirection destinations are omitted from permi…","severity":"critical","cvss":9.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-22"],"vendor":"mistralai","product":"mistral-vibe","affected":["mistral-vibe >= 1.3.4 <= *"],"published":"2026-09-11","updated":"2026-09-11","sourceUpdated":"2026-09-11T17:35:21.440","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87984","references":[{"url":"https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe2","label":"6f8de1f0-f67e-45a6-b68f-98777fdb759c"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-11T14:54:22.701507Z"},"cvssSource":"cna","ingestedAt":"2026-09-11T16:45:47.862Z","epss":0.00428,"epssPercentile":0.36665,"slug":"CVE-2026-87984","body":"## Overview\n\nAn arbitrary file write vulnerability in Mistral Vibe, introduced in version 1.3.4, allows an attacker to create or overwrite files outside the active workspace without user approval. Shell redirection destinations are omitted from permission checks, enabling otherwise allowlisted commands to write to arbitrary paths accessible to the Vibe process.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}