CVE-2026-31072

CRITICAL

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 fun...

Affects 0 products across 2 vendors.

CVSS 3.19.8
EPSS1.0%
Percentile62th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-502: Deserialization of Untrusted Data

Software deserializes untrusted data without validation, allowing crafted objects to execute arbitrary code.

Related Attack Patterns (CAPEC)
CAPEC-586 Object Injection
via CWE-502

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

The JSONSerializer and CBORSerializer in APScheduler are vulnerable to Remote Code Execution (RCE) due to insecure deserialization, allowing arbitrary code execution.

BSID: BS-2026-GLOBAL-080124-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2026-31072?
The JSONSerializer and CBORSerializer in APScheduler are vulnerable to Remote Code Execution (RCE) due to insecure deserialization, allowing arbitrary code execution.
What is the CVSS score for CVE-2026-31072?
CVE-2026-31072 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 1.0%.
Is CVE-2026-31072 actively exploited?
No confirmed active exploitation of CVE-2026-31072 as of 2026-09-25.
How do I remediate CVE-2026-31072?
Priority: IMMEDIATE.
What systems are affected by CVE-2026-31072?
CVE-2026-31072 affects Class; Python.
Vulnerability Details
CVE IDCVE-2026-31072
BSIDBS-2026-GLOBAL-080124-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2026-05-19
Last Modified2026-07-24
ICS Relevance15%
Weakness (CWE)
SourceNVD
Official 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

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

An attacker can exploit the unmarshal_object function to dynamically import modules and call __setstate__ on any class available in the Python environment, leading to arbitrary code execution.

Exploitation Likelihood: CRITICAL

Affected Products
VendorProductAffected Versions
Class — —
Python — —
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 149 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hashbf8dfe5d1a15a127a8900fdbd023a80a5c1de3cb9c99f64946b0350fd12958e314d548d757c289c1815c881a25275614a4b4bd8298b514b26e952cdfd1d4d5f7
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