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. 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.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.0% chance of exploitation in the next 30 days; higher than 62% of CVEs (scores of 2026-10-25)

CWEs

CWE-843, CWE-502

Published

2026-08-07

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• apache:fory

References

• https://lists.apache.org/thread/oywndv60jwqdv6j37t7bc1qbcc4b235r
• http://www.openwall.com/lists/oss-security/2026/08/07/3

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