What is CVE-2026-31072?

CVE-2026-31072 is a critical-severity vulnerability in N/a, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-05-19.

How severe is CVE-2026-31072?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in N/a

CVE-2026-31072

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 instantia…

Vulnerability class: Insecure Deserialization

EPSS: 0.002 (38.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-31072?: CVE-2026-31072 is a critical-severity vulnerability in N/a, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-05-19.
How severe is CVE-2026-31072?: Critical severity. CVSS v3 base score is 9.8 out of 10.