CVE-2026-71560: Apache Fory: Out-of-bounds heap read in C++ struct deserializer tagged-int fast-path

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-07 · updated 2026-10-24
Weakness: CWE-502

Description

Out-of-bounds Read vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from 0.14.0 before 1.5.0 when deserializing structs containing tagged integer fields. A crafted input payload may trigger an out-of-bounds heap read in the tagged integer fast-path deserializer, potentially causing information disclosure or denial of service. Users are recommended to upgrade to Apache Fory 1.5.0, which fixes this issue. Applications that do not use Apache Fory C++ or do not use tagged integer fields are not affected.

Affected products

Apache Software Foundation Apache Fory: from 0.14.0 before 1.5.0 — fixed in 1.5.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Fory 1.5.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-71560 or the next vulnerability affects your stack