CVE-2019-5064Network attack vector

Code execution via unchecked JSON string length

Published Jan 3, 2020 · Updated Aug 4, 2024

Out-of-bounds write in OpenCV 4.1.0 allows remote attackers to execute code via a crafted JSON file supplied to an application. The JSONParser in modules/core/src/persistence_json.cpp appends decoded string data with memcpy into a fixed-size buffer without checking cumulative length, causing heap corruption. Exploitation requires an application to load attacker-controlled JSON; corruption can crash the process or enable code execution.

CVSS severity8.8
High
EPSS probability10.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in OpenCV 4.1.0 allows remote attackers to execute code via a crafted JSON file supplied to an application. The JSONParser in modules/core/src/persistence_json.cpp appends decoded string data with memcpy into a fixed-size buffer without checking cumulative length, causing heap corruption. Exploitation requires an application to load attacker-controlled JSON; corruption can crash the process or enable code execution.

The record

CVE
CVE-2019-5064
Published
Jan 3, 2020
Updated
Aug 4, 2024
Vendor
OpenCV
Product
OpenCV
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=OpenCV 4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenCV · OpenCVversion=OpenCV 4.1.0

Published CVSS scores

8.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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