Common Weakness Enumeration

CWE-502

Allowed

Deserialization of Untrusted Data

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

5191 vulnerabilities reference this CWE, most recent first.

CVE-2026-25632 (GCVE-0-2026-25632)

Vulnerability from cvelistv5 – Published: 2026-02-06 20:24 – Updated: 2026-02-06 20:56
VLAI
Title
EPyT-Flow has unsafe JSON deserialization (__type__)
Summary
EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water distribution networks. Prior to 0.16.1, EPyT-Flow’s REST API parses attacker-controlled JSON request bodies using a custom deserializer (my_load_from_json) that supports a type field. When type is present, the deserializer dynamically imports an attacker-specified module/class and instantiates it with attacker-supplied arguments. This allows invoking dangerous classes such as subprocess.Popen, which can lead to OS command execution during JSON parsing. This also affects the loading of JSON files. This vulnerability is fixed in 0.16.1.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-06 20:56 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
WaterFutures EPyT-Flow Affected: < 0.16.1
Create a notification for this product.
Show details on NVD website
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CVE-2026-25615 (GCVE-0-2026-25615)

Vulnerability from cvelistv5 – Published: 2026-02-03 19:18 – Updated: 2026-02-05 06:19
VLAI
Summary
Blesta 3.x through 5.x before 5.13.3 allows object injection, aka CORE-5668.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-03 20:54 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Blesta Blesta Affected: 3.0.0 , < 5.13.3 (semver)
Create a notification for this product.
Show details on NVD website
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CVE-2026-25614 (GCVE-0-2026-25614)

Vulnerability from cvelistv5 – Published: 2026-02-03 19:16 – Updated: 2026-02-05 06:19
VLAI
Summary
Blesta 3.x through 5.x before 5.13.3 allows object injection, aka CORE-5680.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-03 20:57 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Blesta Blesta Affected: 3.0.0 , < 5.13.3 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-25551 (GCVE-0-2026-25551)

Vulnerability from cvelistv5 – Published: 2026-06-04 17:20 – Updated: 2026-06-08 18:28
VLAI
Title
Seagull Software BarTender Deserialization Privilege Escalation via .NET Remoting Service
Summary
Seagull Software BarTender 2021 R1 through 12.0.1 contains an insecure deserialization vulnerability that allows low-privileged local users to escalate privileges. The DataServiceSingleton .NET Remoting endpoint is bound to localhost on TCP port 7375 via BtSystem.Service.exe, limiting the attack surface to local access only. The endpoint is configured with BinaryServerFormatterSinkProvider and TypeFilterLevel set to Full. A low-privileged local attacker can send YSoSerial.NET-generated BinaryFormatter payloads to the localhost-bound endpoint to achieve code execution as NT AUTHORITY\\SYSTEM.
Severity
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-08 18:27 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Seagull Software, LLC. BarTender 2021 Affected: R1 , ≤ 12.0.1 (custom)
Create a notification for this product.
Date Public
2026-06-03 16:00
Credits
Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp. Jan A. Rodriguez, Pentester, GM Sectec, Corp. VulnCheck
Show details on NVD website
To clipboard 

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CVE-2026-25550 (GCVE-0-2026-25550)

Vulnerability from cvelistv5 – Published: 2026-06-04 17:13 – Updated: 2026-06-04 17:50
VLAI
Title
Seagull Software BarTender Unauthenticated RCE via .NET Remoting Service
Summary
Seagull Software BarTender 2010, 2016, and 2019 contain an unauthenticated remote code execution vulnerability in the .NET Remoting service exposed on TCP port 7375 via BtSystem.Service.exe. The service registers an unauthenticated singleton endpoint — BarTenderSystem for BarTender 2016 <= R9, and DataServiceSingleton for BarTender 2019 <= R10 — configured with BinaryServerFormatterSinkProvider and TypeFilterLevel set to Full. An unauthenticated remote attacker can exploit .NET Remoting object unmarshalling to read or write arbitrary files on the server using the .NET WebClient class, or coerce NTLMv2 authentication by supplying a UNC path to an attacker-controlled server, enabling sensitive credential disclosure, remote code execution, or lateral movement depending on service account privileges and network environment. The service runs in the context of NT AUTHORITY\SYSTEM.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-04 17:49 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-06-03 00:00
Credits
Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp. Jan A. Rodriguez, Pentester, GM Sectec, Corp. VulnCheck
Show details on NVD website
To clipboard 

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CVE-2026-25524 (GCVE-0-2026-25524)

Vulnerability from cvelistv5 – Published: 2026-04-20 16:11 – Updated: 2026-04-20 16:54
VLAI
Title
OpenMage LTS's Phar Deserialization leads to Remote Code Execution
Summary
Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to version 20.17.0, PHP functions such as `getimagesize()`, `file_exists()`, and `is_readable()` can trigger deserialization when processing `phar://` stream wrapper paths. OpenMage LTS uses these functions with potentially controllable file paths during image validation and media handling. An attacker who can upload a malicious phar file (disguised as an image) and trigger one of these functions with a `phar://` path can achieve arbitrary code execution. Version 20.17.0 patches the issue.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-20 16:44 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
OpenMage magento-lts Affected: < 20.17.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-25449 (GCVE-0-2026-25449)

Vulnerability from cvelistv5 – Published: 2026-03-18 13:12 – Updated: 2026-04-28 16:14
VLAI
Title
WordPress Traveler theme < 3.2.8.1 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in shinetheme Traveler traveler allows Object Injection.This issue affects Traveler: from n/a through < 3.2.8.1.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-18 20:03 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
shinetheme Traveler Affected: 0 , ≤ 3.2.8.1 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:44
Credits
Phat RiO | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-25445 (GCVE-0-2026-25445)

Vulnerability from cvelistv5 – Published: 2026-03-19 08:37 – Updated: 2026-04-28 16:14
VLAI
Title
WordPress WishList Member X plugin <= 3.29.0 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Membership Software WishList Member X allows Object Injection.This issue affects WishList Member X: from n/a through 3.29.0.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-19 13:07 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Membership Software WishList Member X Affected: n/a , ≤ 3.29.0 (custom)
Create a notification for this product.
Credits
0xd4rk5id3 | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-25429 (GCVE-0-2026-25429)

Vulnerability from cvelistv5 – Published: 2026-03-25 16:14 – Updated: 2026-04-28 16:14
VLAI
Title
WordPress Nexa Blocks plugin <= 1.1.1 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in wpdive Nexa Blocks nexa-blocks allows Object Injection.This issue affects Nexa Blocks: from n/a through <= 1.1.1.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 15:44 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
wpdive Nexa Blocks Affected: 0 , ≤ 1.1.1 (custom)
Create a notification for this product.
Date Public
2026-04-22 14:18
Credits
Nabil Irawan | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-25400 (GCVE-0-2026-25400)

Vulnerability from cvelistv5 – Published: 2026-03-25 16:14 – Updated: 2026-04-28 16:14
VLAI
Title
WordPress Apicona theme <= 24.1.0 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in thememount Apicona apicona allows Object Injection.This issue affects Apicona: from n/a through <= 24.1.0.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 15:45 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
thememount Apicona Affected: 0 , ≤ 24.1.0 (custom)
Create a notification for this product.
Date Public
2026-04-22 14:18
Credits
João Pedro S Alcântara (Kinorth) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design Implementation

If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.

Mitigation
Implementation

When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.

Mitigation
Implementation

Explicitly define a final object() to prevent deserialization.

Mitigation
Architecture and Design Implementation
  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Implementation

Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.

Mitigation
Architecture and Design Implementation

Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.

Mitigation MIT-29
Operation

Strategy: Firewall

Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].

CAPEC-586: Object Injection

An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.

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