Common Weakness Enumeration
CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
5154 vulnerabilities reference this CWE, most recent first.
CVE-2026-66713 (GCVE-0-2026-66713)
Vulnerability from cvelistv5 – Published: 2026-07-28 13:44 – Updated: 2026-07-29 03:55
VLAI
EPSS
VEX
Title
Apache Axis2/Java: deserialization of untrusted Data
Summary
Deserialization of Untrusted Data (CWE-502) in the Tribes-based clustering component
in Apache Software Foundation Apache Axis2/Java through 2.0.0 on Apache Tomcat
(only when Tribes clustering is enabled, which is off by default) allows an
unauthenticated remote attacker with network access to the clustering port to
execute arbitrary code via a crafted serialized Java object delivered to the cluster
channel and deserialized in
org.apache.axis2.clustering.tribes.Axis2ChannelListener#messageReceived. Users are
recommended to upgrade to version 2.0.1, which fixes this issue by removing the
clustering feature entirely.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 00:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Axis2/Java |
Affected:
0 , ≤ 2.0.0
(semver)
|
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CVE-2026-66672 (GCVE-0-2026-66672)
Vulnerability from cvelistv5 – Published: 2026-08-20 12:07 – Updated: 2026-08-20 14:34
VLAI
EPSS
VEX
Title
WordPress Flatastic theme <= 2.0 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Flatastic <= 2.0 versions.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 14:34 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/f… | vdb-entry |
Impacted products
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CVE-2026-66650 (GCVE-0-2026-66650)
Vulnerability from cvelistv5 – Published: 2026-08-24 11:54 – Updated: 2026-08-24 12:51
VLAI
EPSS
VEX
Title
WordPress FreightCo theme <= 1.1.15 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in FreightCo <= 1.1.15 versions.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 12:27 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/f… | vdb-entry |
Impacted products
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CVE-2026-66620 (GCVE-0-2026-66620)
Vulnerability from cvelistv5 – Published: 2026-08-18 13:59 – Updated: 2026-08-18 19:48
VLAI
EPSS
VEX
Title
WordPress OptionTree plugin <= 2.7.3 - PHP Object Injection vulnerability
Summary
Editor PHP Object Injection in OptionTree <= 2.7.3 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:32 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Derek Herman | OptionTree |
Affected:
n/a , ≤ 2.7.3
(custom)
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CVE-2026-66583 (GCVE-0-2026-66583)
Vulnerability from cvelistv5 – Published: 2026-08-20 12:06 – Updated: 2026-08-20 15:19
VLAI
EPSS
VEX
Title
WordPress Forminator plugin <= 1.57.0 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Forminator <= 1.57.0 versions.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 14:58 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WPMU DEV | Forminator |
Affected:
n/a , ≤ 1.57.0
(custom)
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CVE-2026-66256 (GCVE-0-2026-66256)
Vulnerability from cvelistv5 – Published: 2026-08-13 13:53 – Updated: 2026-08-13 16:18 Unsupported When Assigned
VLAI
EPSS
VEX
Title
Apache Shindig Common, Apache Shindig Social-Api: Remote Code Execution via XStream deserialization (OpenSocial REST API)
Summary
** UNSUPPORTED WHEN ASSIGNED ** Deserialization of Untrusted Data vulnerability in Apache Shindig.
This issue affects Apache Shindig: all versions.
Users with access to the Shindig REST API can send specially-crafted requests to trigger arbitrary code execution on the server.
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Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:53 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Shindig Common |
Affected:
0 , ≤ *
(semver)
|
|
| Apache Software Foundation | Apache Shindig Social-Api |
Affected:
0 , ≤ *
(semver)
|
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CVE-2026-65883 (GCVE-0-2026-65883)
Vulnerability from cvelistv5 – Published: 2026-07-29 09:34 – Updated: 2026-07-29 14:39
VLAI
EPSS
VEX
Title
Joomla Extension - aimy-extensions.com - RCE via PHP object injection in Aimy Captcha-Less Form Guard 18.0 - 20.0
Summary
Joomla Extension - aimy-extensions.com - RCE via PHP object injection in Aimy Captcha-Less Form Guard 18.0 - 20.0 - A forged clfgd field allows PHP objection injection and thereby remote code execution.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-29 12:21 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.aimy-extensions.com/joomla/captcha-le… | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| aimy-extensions.com | Aimy Captcha-Less Form Guard plugin for Joomla |
Affected:
18.0-20.0
|
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CVE-2026-65815 (GCVE-0-2026-65815)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:05 – Updated: 2026-08-31 20:05
VLAI
EPSS
VEX
Title
Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 03:56 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Dynamics 365 (on-premises) version 9.1 |
Affected:
9.0 , < 9.1.0047.0006
(custom)
cpe:2.3:a:microsoft:dynamics_365:*:*:*:*:on-premises:*:*:* |
Date Public
2026-08-11 14:00
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CVE-2026-65665 (GCVE-0-2026-65665)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:04 – Updated: 2026-08-31 20:05
VLAI
EPSS
VEX
Title
Microsoft SharePoint Server Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 00:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft SharePoint Server 2019 |
Affected:
16.0.0 , < 16.0.10417.20198
(custom)
|
|
| Microsoft | Microsoft SharePoint Server Subscription Edition |
Affected:
16.0.0 , < 16.0.19725.20522
(custom)
|
Date Public
2026-08-11 14:00
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CVE-2026-65663 (GCVE-0-2026-65663)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:04 – Updated: 2026-08-31 20:05
VLAI
EPSS
VEX
Title
Microsoft SharePoint Server Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 00:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |
Affected:
16.0.0 , < 16.0.5565.1001
(custom)
|
|
| Microsoft | Microsoft SharePoint Server 2019 |
Affected:
16.0.0 , < 16.0.10417.20198
(custom)
|
|
| Microsoft | Microsoft SharePoint Server Subscription Edition |
Affected:
16.0.0 , < 16.0.19725.20522
(custom)
|
Date Public
2026-08-11 14:00
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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.