What is CVE-2026-48207?

CVE-2026-48207 is a critical-severity vulnerability in Apache Fory, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-05-21.

How severe is CVE-2026-48207?

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

Deserialization in Apache Fory

CVE-2026-48207

Deserialization of untrusted data in Apache Fory PyFory. PyFory's ReduceSerializer could bypass documented DeserializationPolicy validation hooks during reduce-state restoration and global-name resolution. An application is vulnerable if i…

Vulnerability class: Insecure Deserialization

EPSS: 0.001 (33.8th 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

Apache Fory
Apache Software Foundation Fory — versions 0.13.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

security@apache.org (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-48207?: CVE-2026-48207 is a critical-severity vulnerability in Apache Fory, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-05-21.
How severe is CVE-2026-48207?: Critical severity. CVSS v3 base score is 9.8 out of 10.