CVE-2026-71559 Apache Fory: Uncaught panic (remote DoS) in Go meta-string decoder from untrusted metadata

High 7.5 Published 7 Aug 2026 Updated 7 Aug 2026

An attacker can cause a denial of service in applications using the Apache Fory Go library by sending crafted data with malformed type metadata.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-71559?

CVE-2026-71559 is a high-severity unsafe deserialization vulnerability in Apache Fory, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-502

Which versions are affected by CVE-2026-71559?

It affects 1 product.

Products include Apache Fory.

How do I fix CVE-2026-71559?

No fix has been published for CVE-2026-71559 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-71559 being exploited?

There is no known exploitation of CVE-2026-71559 in the wild and no public exploit code.

Sources

Also known as GHSA-63m9-m4r7-4qjg.