CVE-2026-71558Network attack vector

Code execution via unchecked smart-pointer type metadata

Published Aug 7, 2026 · Updated Aug 7, 2026

Heap type confusion in Apache Fory C++ 0.14.0 through 1.4.0 allows remote attackers to execute code via crafted serialized input. Polymorphic smart-pointer reads accept attacker-controlled runtime type metadata without verifying compatibility, then treat the incompatible heap object as the declared base type. Exposure requires an application to deserialize untrusted data through this C++ feature; resulting undefined behavior includes process crashes and code execution.

CVSS severity9.8
Critical
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap type confusion in Apache Fory C++ 0.14.0 through 1.4.0 allows remote attackers to execute code via crafted serialized input. Polymorphic smart-pointer reads accept attacker-controlled runtime type metadata without verifying compatibility, then treat the incompatible heap object as the declared base type. Exposure requires an application to deserialize untrusted data through this C++ feature; resulting undefined behavior includes process crashes and code execution.

The record

CVE
CVE-2026-71558
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
The Apache Software Foundation
Product
Apache Fory
Classifications
CWE-843, CWE-502
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.14.0 <1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Foryversion=0.14.0 <1.5.0

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
CWE-502Deserialization of Untrusted Data

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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