First reported daily.dev
Lead dispatch
First reported secmate.dev
Mistral Vibe Permission Bypass and Arbitrary Code Execution
SecMate disclosed two flaws in Mistral Vibe 2.25.0 (CVE-2026-87987 and CVE-2026-87984) where the coding agent's Bash tool used Tree-sitter to extract a reduced representation of a shell command for its permission allowlist, then executed the original untouched string. Hostile repository content could lead the model to emit a crafted tool call (e.g. an environment assignment prefixing an allowlisted command) that the permission parser classified as read-only, bypassing the approval prompt and enabling arbitrary code execution and reads/writes outside the authorized workspace. Mistral released Vibe 2.25.4 on September 12, 2026.permission-bypass · arbitrary-code-execution · command-injection · indirect-prompt-injection · data-exfiltration · tool-abuse
ai-agents · coding-agent · llm
Severity
0.75
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