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CVE-2026-87985: An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission…
CVE-2026-87985 is rated critical with a CVSS v4.0 base score of 10.0. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.
Vulnerability description
An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using ANSI-C quoted arguments. These arguments are not properly inspected, enabling a crafted allowlisted command to execute arbitrary code on the user's system without approval.
Severity breakdown
CVSS v4.0 10.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Attack vector: Network. Exploitable remotely over the network.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Attack requirements: None. No deployment or execution conditions are needed.
- Privileges required: None. No account or prior access is needed.
- User interaction: None. No action from any user is needed.
- Confidentiality impact (vulnerable system): High. Total loss of confidentiality.
- Integrity impact (vulnerable system): High. Total loss of integrity.
- Availability impact (vulnerable system): High. Total loss of availability.
- Confidentiality impact (subsequent systems): High. Total loss of confidentiality on other systems.
- Integrity impact (subsequent systems): High. Total loss of integrity on other systems.
- Availability impact (subsequent systems): High. Total loss of availability of other systems.
Underlying weakness
CWE-184: Incomplete List of Disallowed Inputs
The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.