CVE-2026-95831 Crypt::SelfCertificate versions from 1.01 through 1.05 for Perl contains malware which executes Python code from an obfuscated URL.

High 7.8 Published 22 Sep 2026 Updated 23 Sep 2026

Malicious code in Crypt::SelfCertificate executes arbitrary Python scripts from a remote URL, allowing attackers to run code on affected systems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-95831?

CVE-2026-95831 is a high-severity vulnerability, published on 22 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Crypt::SelfCertificate versions from 1.01 through 1.05 for Perl contains malware which executes Python code from an obfuscated URL.

The generate_certificate runs a Python script saved as a certificate file. The pyhton script attempts to retrieve code from a hardcoded http URL that is obfuscated with base64 encoding and run the response body directly.

The impact is that arbitrary code can be invoked as the user, without a dropped script being saved on the affected host.

The releases have no test scripts nor build hooks. The intention may have been to trigger the payload after installation.

For version 1.01, the dropper script is in lib/Crypt/SelfCertificate/sample/validate.p12.

For version 1.05, the dropper script is in lib/Crypt/SelfCertificate/sample/cert7.pem.

The SHA-256 digests of the files are

fbff21f45ff748365062a5e36fb2d72558cad82a507a6f357f320b4fcdf07760 Crypt-SelfCertificate-1.01.tar.gz 27b2d2d3174ad771474fff2521f5084ec231e9218ea8c832515aef1cbd5897bc lib/Crypt/SelfCertificate/sample/validate.p12

9fdfa7d69b034b77d4510cda567e8da1e486ca81c7daaadc5732a45c41d71991 Crypt-SelfCertificate-1.05.tar.gz 27b2d2d3174ad771474fff2521f5084ec231e9218ea8c832515aef1cbd5897bc lib/Crypt/SelfCertificate/sample/cert7.pem

Weakness: CWE-506

Which versions are affected by CVE-2026-95831?

How do I fix CVE-2026-95831?

No fix has been published for CVE-2026-95831 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-95831 being exploited?

There is no known exploitation of CVE-2026-95831 in the wild and no public exploit code.

Sources

Also known as GHSA-9ppr-x3mg-6jg2.