CVEvulnerability
CVE-2026-31072
9.8 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2026-05-19
- Last modified
- 2026-07-24
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-502
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
Related
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6 gist.github.com
- https://github.com/agronholm/apscheduler github.com
- https://access.redhat.com/security/cve/CVE-2026-31072 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2479907 bugzilla.redhat.com
- https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6 gist.github.com
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31072.json security.access.redhat.com