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.
History

Sat, 17 Oct 2026 08:45:00 +0000

Type Values Removed Values Added
First Time appeared Mistral
Mistral mistral-vibe
Vendors & Products Mistral
Mistral mistral-vibe

Tue, 13 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
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.
Title Mistral Vibe < 2.25.5 Permission Bypass via Bash Line Continuation
Weaknesses CWE-436
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-13T18:17:05.062Z

Updated: 2026-10-26T19:25:04.692Z

Reserved: 2026-10-12T15:52:36.682Z

Link: CVE-2026-109428

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T19:18:33.097

Modified: 2026-10-26T20:17:46.263

Link: CVE-2026-109428

cve-icon Redhat

No data.