Answer in brief
CVE-2026-31072 records a Critical severity (CVSS 9.8) vulnerability in APScheduler's JSONSerializer and CBORSerializer are vulnerable to Remote Code Execution (RCE) via Insecure Deserialization. The current sources do not mark it as known exploited. The current feed maps apscheduler (pip), apscheduler (pypi). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps apscheduler (pip), apscheduler (pypi). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| apschedulerpip | >=4.0.0a1,<=4.0.0a6 | Not reported |
| apschedulerpypi | >=4.0.0a1 | Not reported |
Published upstream
May 19, 2026
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Oct 27, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Jun 11, 2026
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
Quoted source text, attributed separately from HOL analysis.