CVE-2026-44450
CriticalCVSS 9.9Exploitation Probability (EPSS)
Low risk30th percentile - higher than 30% of all known CVEs
Summary
Vulnerability in Lumiverse (AI chat app) before version 0.9.7 allows a logged-in user to execute arbitrary code on the server via the MCP server creation endpoint. The attacker can use -e or -c flags in args, leading to remote code execution. The server listens on all interfaces and host-header rebinding protection is easily bypassed.
Risk Assessment
Risk is critical – an attacker can gain full control of the server, execute arbitrary code, and potentially steal data or install malware.
Recommendation
Update Lumiverse to version 0.9.7 or later. Restrict server access to trusted networks and enforce strong authentication.
Other vulnerabilities in Lumiverse
See all- CVE-2026-44451Critical
Lumiverse prior to 0.9.7 has a vulnerability in the component override system that transpiles TSX via Sucrase and executes it with new Function, shadowing dangerous globals. Static protection and shadowing are bypassed by reconstructing identifiers from string fragments and DOM sandbox escape. A malicious theme pack (.lumitheme) can execute code in an authenticated user's session.
- CVE-2026-44449Critical
Lumiverse before version 0.9.7 contains a command injection vulnerability in the SMB path handling function. When the primary toSmbPath method fails, the code uses an unvalidated basename in the smbclient script, allowing arbitrary command execution via injection of ';' separator or '!cmd' local escape.
- CVE-2026-44444Critical
Vulnerability in Lumiverse – the Spindle extension build pipeline runs `bun install` without `--ignore-scripts`, allowing a malicious extension to execute host-level code before security scanning. Fixed in version 0.9.7.
- CVE-2026-44443Medium
In Lumiverse before version 0.9.7, the consumeNonce() function does not validate any value from the incoming HTTP request or bind the nonce to the admin's session. If the admin's sign-up fails before the before hook fires (e.g., due to a duplicate email), the nonce remains set and can be used by an attacker within a 10-second window to register an unauthorized account.
Original NVD description (English source)
Lumiverse is a full-featured AI chat application. Prior to 0.9.7, the MCP server creation endpoint validates the command field against an allowlist of binary names but forwards the args array to the child process without any validation. Every binary on the allowlist accepts an inline-code execution flag (-e for node/bun, -c for python3/deno), giving any logged-in user arbitrary OS-level code execution on the Lumiverse server. The route requires only requireAuth (not requireOwner). The server binds on all interfaces (::) and the host-header rebinding check is bypassed trivially by any HTTP client that sends Host: localhost:<port> directly, making this exploitable from any machine with network access to the server port. This vulnerability is fixed in 0.9.7.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS