CVE-2026-31072
CVE-2026-31072
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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
CVSS 9.8 · Critical · EPSS 0.8%
- Published
- Updated
Stack: python
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
apscheduler PyPI
- Versions
- 4.0.0a1
- 4.0.0a2
- 4.0.0a3
- 4.0.0a4
- 4.0.0a5
- 4.0.0a6
- Affected ranges
- ECOSYSTEM: ≥ 4.0.0a1, ≤ 4.0.0a6
No fix published
Original sources
- https://github.com/agronholm/apscheduler
- https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6
- https://access.redhat.com/security/cve/CVE-2026-31072
- https://bugzilla.redhat.com/show_bug.cgi?id=2479907
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31072.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-31072