CVE-2026-31072

Description

The JSONSerializer and CBORSerializer in APScheduler (all versions including 3.10.x and 4.0.0a5) are vulnerable to Remote Code Execution (RCE) via Insecure Deserialization. The unmarshal_object function allows for arbitrary class instantiation and state injection by dynamically importing modules and calling __setstate__ on any class available in the Python environment. An attacker can exploit this by submitting a specially crafted JSON or CBOR payload to an application using these serializers

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

References

• https://security-tracker.debian.org/tracker/CVE-2026-31072
• https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6
• https://github.com/agronholm/apscheduler
• https://www.suse.com/security/cve/CVE-2026-31072.html

CWEs

CWE-502