CVE-2026-31072
📛 CVE Title
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
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mitre
- CVSS severity
- critical
- CVSS score
- 9.8 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Effective score
- 9.8 / 10 CRITICAL source: CNA overview
- CWE(s)
- —
- Reserved
- 2026-03-09
- Published
- 2026-05-19 00:00 UTC
- Last updated
- 2026-05-20 15:46 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/31xxx/CVE-2026-31072.json
- Linked Threat
- CVE-2026-31072 — CVE-2026-31072
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-19 16:16:20 UTC
- NVD last modified
- 2026-05-20 17:16:20 UTC
- NVD CVSS v3.1
- 9.8 / 10 CRITICAL source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0013 (probability of exploitation in next 30 days)
- EPSS percentile
- 32.52% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-502
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-25 00:31 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-30947 - Assigner
- mitre
- Published
- May 19, 2026, 12:00:00 AM
- Updated
- May 20, 2026, 3:46:40 PM
- EUVD base score (CVSS 3.1)
-
9.8 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EUVD-reported EPSS
- 0.1800
- Vendors
- n/a
- Products
-
n/a (n/a)
- Aliases
-
GHSA-9cfw-f3f9-7mm7
ENISA 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
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| n/a | n/a |
n/a (affected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
Web references (5)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6 tenable:gist.github.com
- https://github.com/agronholm/apscheduler tenable:github.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-31072 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-31072 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (3)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6 cve@mitre.org
- https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://github.com/agronholm/apscheduler cve@mitre.org
Remediations (16)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:app.opencve.io
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 ...
2026-05-23 22:19 UTC -
web:bugzilla.redhat.com
Alias: CVE-2026-31072 Product: Security Response Classification: Other Component: vulnerability Sub Component: --- Version: unspecified Hardware: All OS: Linux Priority: high Severity: high Target Milestone: --- Assignee: Product Security QA Contact: Docs Contact: URL: Whiteboard: Depends On: Blocks: TreeView+ depends on / blocked Reported ...
2026-05-23 22:19 UTC -
web:cvefeed.io
The following products are affected by CVE-2026-31072 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.
2026-05-23 22:19 UTC -
web:guide.sonatype.com
Technical security analysis for CVE-2026-31072 . CVSS 8.8 severity. View CVSS vectors, CWE classifications, and exploit maturity ratings.
2026-05-23 22:19 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-23 22:19 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-23 22:19 UTC -
web:securitricks.com
CVE CVE-2026-31072 - Score : None - Source : cve@mitre.org - 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__ ...
2026-05-23 22:19 UTC -
web:ubuntu.com
Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things.
2026-05-23 22:19 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-23 22:19 UTC -
web:www.thehackerwire.com
How do I fix or mitigate CVE-2026-31072 ? To protect against CVE-2026-31072 , you should: (1) Apply the latest security patches from the vendor, (2) Check official security advisories for specific remediation steps, (3) Update affected software to the latest version, and (4) Monitor your systems for any signs of exploitation.
2026-05-23 22:19 UTC -
web:cve.halosecurity.com
Learn about CVE-2026-31072 , a critical vulnerability in APScheduler's JSON and CBOR serializers. This insecure deserialization flaw allows arbitrary code execution and server co...
2026-05-26 02:59 UTC -
web:research.averlon.ai
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...
2026-05-26 02:59 UTC -
web:security.snyk.io
APScheduler is an In-process task scheduler with Cron-like capabilities Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the unmarshal_object function in the JSONSerializer and CBORSerializer serializers. An attacker can exploit this by submitting a specially crafted JSON or CBOR payload to an application using these serializers.
2026-05-26 02:59 UTC -
web:www.endorlabs.com
Automatically patch vulnerabilities without upgrading Fix Without Upgrading Detect compatible fix Apply safe remediation Fix with a single pull request
2026-05-26 02:59 UTC -
web:www.microsoft.com
Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.
2026-05-26 02:59 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-26 02:59 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-31072.json.
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