Vulnerability · Published May 26, 2026 · Assigned by GitHub_M
CVE-2026-44449Lumiverse: SMB `exists()` basename injection via smbclient `!cmd` escape
Critical 9.1
In plain English
A critical-severity argument injection in Lumiverse from prolix-oc. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).
Official description
Lumiverse is a full-featured AI chat application. Prior to 0.9.7, when the primary toSmbPath(fullPath) call throws, the method falls back to a dirname/basename split and only validates the directory prefix. The basename is concatenated directly into the smbclient -c script without validation. smbclient interprets ; as a subcommand separator and !cmd as a local-shell escape that runs cmd on the host. A path whose directory component is clean but whose basename contains "; !<cmd>; echo " achieves arbitrary command execution on the Lumiverse server. This vulnerability is fixed in 0.9.7.
Affected products (as reported)
Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/prolix-oc/Lumiverse/security/advisories/GHSA-4v38-9hqq-7j53 x_refsource_CONFIRM