django-pyas2 through 1.2.3 is vulnerable to OS command injection via the cmd_receive and cmd_send fields on the Partner model. These fields are passed directly to os.system() in pyas2/utils.py without sanitization, allowing an authenticated admin user to execute arbitrary commands on the server when an AS2 message is received or sent.

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-42168
• https://github.com/abhishek-ram/django-pyas2
• https://github.com/abhishek-ram/django-pyas2/releases/tag/v1.2.3
• https://github.com/m4ty-m/vulnerability-research/tree/main/CVE-2026-42168