What is CVE-2026-71559?

CVE-2026-71559 is a high-severity vulnerability in Apache Fory, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2026-08-07.

How severe is CVE-2026-71559?

High severity. CVSS v3 base score is 7.5 out of 10.

Deserialization in Apache Fory

CVE-2026-71559

Deserialization of Untrusted Data vulnerability in the Go implementation of Apache Fory allows an attacker to cause a denial of service by supplying crafted data containing malformed type metadata, which triggers an uncaught panic. This issue affects Apache Fory: from 0.16.0 before 1.5.0. Users of other language implementations are not affected. Users are recommended to upgrade to version 1.5.0, which fixes the issue.

Vulnerability class: Insecure Deserialization

Published 2026-08-07 · last modified 2026-10-24.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.6th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Apache Fory
Apache Software Foundation Fory — versions 0.16.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

lists.apache.org/thread/f28bw002p32yt723rvv3dcwdkljys8r3 (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-71559?: CVE-2026-71559 is a high-severity vulnerability in Apache Fory, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2026-08-07.
How severe is CVE-2026-71559?: High severity. CVSS v3 base score is 7.5 out of 10.