CVE-2026-87987

Description

An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using environment variable assignments preceding allowlisted commands. These assignments are excluded from inspection, enabling attacker-controlled environment variables to cause arbitrary code execution without user approval.

Is your site exposed to CVE-2026-87987?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-15 CWE-15

References

Other References

https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe5

Frequently Asked Questions

What is CVE-2026-87987? +

An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using environment variable assignments preceding allowlisted commands. These assignments are excluded from inspection, enabling attacker-controlled environment variables to cause arbitrary code execution without user approval.

How do I check if I'm vulnerable to CVE-2026-87987? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-46399

HAX CMS helps manage microsite universe with PHP or NodeJs backends. The PHP version of HAX CMS prior to version …

CVE-2024-11166

For TCAS II systems using transponders compliant with MOPS earlier than RTCA DO-181F, an attacker can impersonate a ground station …

CVE-2025-0425

Via the GUI of the "bestinformed Infoclient", a low-privileged user is by default able to change the server address of …

CVE-2025-41452

Post-authenticated external control of system web interface configuration setting vulnerability in Danfoss AK-SM8xxA Series prior to 4.3.1, which could allow …

CVE-2025-64726

Socket Firewall is an HTTP/HTTPS proxy server that intercepts package manager requests and enforces security policies by blocking dangerous packages. …

CVE-2026-0418

Insufficient configuration management in the listed devices allows authenticated administrators connected to the local network to tamper with the system.