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.

5551 vulnerabilities reference this CWE, most recent first.

CVE-2026-78032 (GCVE-0-2026-78032)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:11 – Updated: 2026-08-28 16:10
VLAI
Summary
SOY CMS contains an issue with deserialization of untrusted data. An arbitrary code may be executed by an attacker with the web server privilege.
Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:10 UTC
CWE
  • CWE-502 - Deserialization of untrusted data
Assigner
References
Impacted products
Vendor Product Version
Tsuyoshi Saito SOY CMS Affected: 0 , ≤ 3.24.0 (semver)
Create a notification for this product.
Show details on NVD website
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CVE-2026-78006 (GCVE-0-2026-78006)

Vulnerability from cvelistv5 – Published: 2026-09-12 07:39 – Updated: 2026-09-14 19:23
VLAI
Title
The Events Calendar <= 6.17.4 - Unauthenticated PHP Object Injection to Remote Code Execution
Summary
The The Events Calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 6.17.4 via the is_safe_widget_instance function. This is due to insufficient protection in is_safe_widget_instance, which can be bypassed because PHP fires magic methods during its pre-parse, combined with enable_rendering_widget_copied() forging a valid wp_hash integrity attribute before unserialize() is reached. This makes it possible for unauthenticated attackers to execute code on the server. This is exploitable without authentication or approval because the plugin's V2 single-event template runs do_blocks() over buffered comment HTML, and WordPress returns a moderation-hash URL that allows an unauthenticated commenter to immediately view their own pending comment, delivering the injected block markup to the vulnerable code path before any moderation occurs. This does require comments to be enabled and visible on events.
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 2026-09-14 19:08 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
stellarwp The Events Calendar Affected: 0 , ≤ 6.17.4 (semver)
Create a notification for this product.
Credits
Chloe Chamberland Wordfence Argus
Show details on NVD website
To clipboard 

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CVE-2026-77646 (GCVE-0-2026-77646)

Vulnerability from cvelistv5 – Published: 2026-08-20 22:11 – Updated: 2026-08-21 20:08
VLAI
Title
Server Side Request Forgery (SSRF) vulnerability reported in Windchill
Summary
A Server-Side Request Forgery (SSRF) vulnerability has been reported in PTC Windchill PDMLink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
Severity
7.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/AU:Y/R:U/V:D/RE:M/U:Red
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:49 UTC
CWE
  • CWE-502 - Deserialization of untrusted data
  • CWE-918 - Server-Side request forgery (SSRF)
Assigner
References
URL Tags
https://www.ptc.com/en/support/article/CS474826 vendor-advisorymitigationpermissions-required
Impacted products
Vendor Product Version
PTC Windchill PDMLink Affected: 11.0 M030
Affected: 11.1 M020
Affected: 11.2.1.0
Affected: 12.0.2.0
Affected: 12.1.2.0
Affected: 13.0.2.0
Affected: 13.1.0.0
Affected: 13.1.1.0
Affected: 13.1.2.0
Affected: 13.1.3.0
Create a notification for this product.
PTC FlexPLM Affected: 11.0 M030
Affected: 11.1 M020
Affected: 11.2.1.0
Affected: 12.0.0.0
Affected: 12.0.2.0
Affected: 12.0.3.0
Affected: 12.1.2.0
Affected: 12.1.3.0
Affected: 13.0.2.0
Affected: 13.0.3.0
Create a notification for this product.
Credits
Richard Clifford of Rootshell Security (https://www.rootshellsecurity.net/)
Show details on NVD website
To clipboard 

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CVE-2026-77645 (GCVE-0-2026-77645)

Vulnerability from cvelistv5 – Published: 2026-08-20 22:08 – Updated: 2026-08-22 03:55
VLAI
Title
Critical Remote Code Execution (RCE) vulnerability reported in Windchill
Summary
A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/AU:Y/R:U/V:C/RE:M/U:Red
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 00:00 UTC
CWE
  • CWE-20 - Improper input validation
  • CWE-502 - Deserialization of untrusted data
Assigner
References
URL Tags
https://www.ptc.com/en/support/article/CS474826 vendor-advisorymitigationpermissions-required
Impacted products
Vendor Product Version
PTC Windchill PDMLink Affected: 11.0 M030
Affected: 11.1 M020
Affected: 11.2.1.0
Affected: 12.0.2.0
Affected: 12.1.2.0
Affected: 13.0.2.0
Affected: 13.1.0.0
Affected: 13.1.1.0
Affected: 13.1.2.0
Affected: 13.1.3.0
Create a notification for this product.
PTC FlexPLM Affected: 11.0 M030
Affected: 11.1 M020
Affected: 11.2.1.0
Affected: 12.0.0.0
Affected: 12.0.2.0
Affected: 12.0.3.0
Affected: 12.1.2.0
Affected: 12.1.3.0
Affected: 13.0.2.0
Affected: 13.0.3.0
Create a notification for this product.
Credits
Arthur Aires (https://arthurair.es/) brenocss (LinkedIn: @brenocss) Bruno Milreu (LinkedIn: @bruno-milreu)
Show details on NVD website
To clipboard 

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CVE-2026-77484 (GCVE-0-2026-77484)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:18 – Updated: 2026-10-08 18:19
VLAI
Title
Microsoft SQL Server Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:24 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-09-08 14:00
Show details on NVD website
To clipboard 

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CVE-2026-77138 (GCVE-0-2026-77138)

Vulnerability from cvelistv5 – Published: 2026-08-25 09:00 – Updated: 2026-08-25 14:05
VLAI
Title
Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_powermail)
Summary
The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize(). A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server.
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
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:04 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-08-25 09:00
Credits
Torben Hansen
Show details on NVD website
To clipboard 

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CVE-2026-76967 (GCVE-0-2026-76967)

Vulnerability from cvelistv5 – Published: 2026-09-08 00:12 – Updated: 2026-09-09 04:25
VLAI
Title
Insecure Deserialization in SAP NetWeaver Business Client
Summary
SAP NetWeaver Business Client does not perform sufficient validation when processing certain locally stored data during application startup. An attacker with low privileges on the local system could replace this data with specially crafted content. When the application is next launched, the crafted content is processed and could lead to arbitrary code execution in the context of the user. This results in a high impact on confidentiality, integrity and availability of the application.
Severity
7.8 (High)
CVSS:3.1/AV:L/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 2026-09-08 00:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
SAP_SE SAP NetWeaver Business Client Affected: BC-WD-CLT-BUS 8.00
Affected: 8.10
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-76850 (GCVE-0-2026-76850)

Vulnerability from cvelistv5 – Published: 2026-08-19 21:41 – Updated: 2026-09-24 14:19
VLAI
Title
LMDeploy Remote Code Execution via Unsafe Pickle Deserialization in the Disaggregated Serving Peer Connector
Summary
LMDeploy deserializes disaggregated-serving peer messages with pickle. The handle_zmq_recv coroutine in lmdeploy/pytorch/disagg/conn/engine_conn.py reads peer-to-peer cache-free requests with recv_pyobj(), which deserializes the received bytes with pickle.loads(), and the isinstance check against DistServeCacheFreeRequest runs only after deserialization has already completed. The peer that supplies those bytes is caller-controlled: p2p_connect passes remote_engine_endpoint_info.zmq_address from the request body to connect() on the ZMQ PULL socket, and the POST /distserve/p2p_initialize and /distserve/p2p_connect endpoints in lmdeploy/serve/openai/api_server.py apply no authentication unless the server is started with api_keys, which defaults to None. A remote attacker can direct an engine to pull from a ZMQ endpoint under their control and execute arbitrary code in the engine process. Deployments that do not enable disaggregated serving are not affected, because the receive loop is only started once the migration backend accepts the connection.
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: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 14:08 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
InternLM lmdeploy Affected: 0.9.2 , < 0.16.0 (semver)
    cpe:2.3:a:internlm:lmdeploy:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-29 00:00
Credits
AAtomical
Show details on NVD website
To clipboard 

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CVE-2026-76843 (GCVE-0-2026-76843)

Vulnerability from cvelistv5 – Published: 2026-08-24 13:12 – Updated: 2026-08-28 15:18
VLAI
Title
Flair 0.15.0 and 0.15.1 Deserialization of Untrusted Data via ClusteringModel.load
Summary
The official Flair wheels for 0.15.0 and 0.15.1 still contain flair/models/clustering.py, whose ClusteringModel.load static method returns pickle.loads(joblib.load(str(model_file))) and so executes arbitrary Python while loading a model file. Loading a model supplied by an attacker therefore runs that attacker's code with the privileges of the loading process. This is the same sink and the same file as CVE-2024-10073, which records 0.15.0 as the fixed version on the basis that clustering support was dropped in that release; the module was removed from the documented API but remains present in the distributed artifact and reachable by importing flair.models.clustering directly, so the earlier record's fixed version does not hold for the shipped package.
Severity
8.4 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2026-08-24 19:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
flairNLP flair Affected: 0.15.0 , ≤ 0.15.1 (semver)
Create a notification for this product.
Date Public
2026-08-07 00:00
Credits
Michael Holmquist
Show details on NVD website
To clipboard 

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CVE-2026-76834 (GCVE-0-2026-76834)

Vulnerability from cvelistv5 – Published: 2026-09-17 15:16 – Updated: 2026-09-18 18:04 Unsupported When Assigned
VLAI
Title
b2evolution CMS 6.7.8 through 7.2.5 Object Injection via Negative Integer Array Key
Summary
b2evolution CMS versions 6.7.8 through 7.2.5 contain an incomplete fix for CVE-2016-8901 where the serialized-array object check in param_check_serialized_array() fails to reject payloads with negative integer array keys. Unauthenticated attackers can submit crafted serialized PHP objects via POST requests to htsrv/call_plugin.php that bypass validation and reach unserialize(), instantiating arbitrary PHP objects with attacker-chosen properties that may enable code execution if suitable POP gadget chains exist.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/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 2026-09-18 18:04 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
b2evolution b2evolution CMS Affected: 6.7.8 , ≤ 7.2.5 (semver)
    cpe:2.3:a:b2evolution:b2evolution_cms:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-31 00:00
Credits
Adrian Gaitan VulnCheck
Show details on NVD website
To clipboard 

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      "datePublic": "2026-07-31T00:00:00.000Z",
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          "value": "b2evolution CMS versions 6.7.8 through 7.2.5 contain an incomplete fix for CVE-2016-8901 where the serialized-array object check in param_check_serialized_array() fails to reject payloads with negative integer array keys. Unauthenticated attackers can submit crafted serialized PHP objects via POST requests to htsrv/call_plugin.php that bypass validation and reach unserialize(), instantiating arbitrary PHP objects with attacker-chosen properties that may enable code execution if suitable POP gadget chains exist."
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            "subAvailabilityImpact": "NONE",
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            "confidentialityImpact": "HIGH",
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            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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    "dateReserved": "2026-08-19T20:34:00.154Z",
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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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