CVE-2026-44449 Lumiverse: SMB `exists()` basename injection via smbclient `!cmd` escape
Attackers can execute arbitrary commands on the Lumiverse server by injecting shell escapes into SMB file paths due to insufficient validation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44449?
CVE-2026-44449 is a critical command injection vulnerability in prolix-oc Lumiverse, published on 26 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
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.
Weakness: CWE-88
Which versions are affected by CVE-2026-44449?
How do I fix CVE-2026-44449?
No fix has been published for CVE-2026-44449 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-44449 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44449 exists.