CVE-2026-71558: Heap type confusion vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from 0.14.0 before 1.5.0.
CVE-2026-71558 · Severity: critical · CVSS 9.8 · Published 2026-08-07
Heap type confusion vulnerability in Apache Fory C++ deserialization.
This issue affects Apache Fory C++ versions from 0.14.0 before 1.5.0. A crafted input payload can bypass type compatibility checks during polymorphic smart-pointer deserialization, causing an object of an incompatible type to be treated as the declared base type. This may result in undefined behavior and potentially lead to denial of service or arbitrary code execution.
Users are recommended to upgrade to Apache Fory 1.5.0, which fixes this issue. Applications not using Apache Fory C++ polymorphic smart-pointer deserialization are not affected.
No. Junglewise Threat Intelligence has no report of CVE-2026-71558 being exploited in the wild.
How severe is CVE-2026-71558?
Critical severity, with a CVSS score of 9.8, published 7 August 2026.
Which products and versions are affected?
Apache Fory. The advisory does not name versions.
Is there a fix for CVE-2026-71558?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-71558?
Check whether you run Apache Fory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.