GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
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.

5328 vulnerabilities reference this CWE, most recent first.

CVE-2026-92785 (GCVE-0-2026-92785)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:32 – Updated: 2026-09-16 20:32
VLAI
Title
Angel through 3.3.0 Unauthenticated Kryo Deserialization of Arbitrary Classes
Summary
Angel through 3.3.0 deserializes untrusted setAlgoMetrics payload using Kryo without class registration or allowlist validation. Unauthenticated network attackers can instantiate arbitrary classes or exhaust coordinator memory by sending crafted serialized objects to the master RPC endpoint.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:H/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
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Angel-ML angel Affected: 0 , ≤ 3.3.0 (custom)
Create a notification for this product.
Date Public
2026-07-17 00:00
Credits
George Chen
Show details on NVD website
To clipboard 

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CVE-2026-91939 (GCVE-0-2026-91939)

Vulnerability from cvelistv5 – Published: 2026-09-15 20:56 – Updated: 2026-09-16 19:18
VLAI
Title
Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter
Summary
Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize() without allowed_classes restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads to trigger gadget chains and achieve database manipulation or code execution.
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 2026-09-16 19:17 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Cotonti Cotonti Affected: 1.0.0 , ≤ 1.0.0 (custom)
    cpe:2.3:a:cotonti:cotonti_siena:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-13 00:00
Credits
Harsh Raj Singhania
Show details on NVD website
To clipboard 

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CVE-2026-91842 (GCVE-0-2026-91842)

Vulnerability from cvelistv5 – Published: 2026-09-15 15:00 – Updated: 2026-09-15 15:48
VLAI
Title
OpenBankProject OBP-API Kryo Redis.scala KryoInjection.invert deserialization
Summary
A vulnerability has been found in OpenBankProject OBP-API up to 1.10.1. This impacts the function KryoInjection.invert of the file obp-api/src/main/scala/code/api/cache/Redis.scala of the component Kryo Handler. Such manipulation leads to deserialization. The attack can be launched remotely. A high complexity level is associated with this attack. The exploitability is said to be difficult. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Severity
2.1 (Low)
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.1 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
4.1 (Medium)
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 15:48 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
OpenBankProject OBP-API Affected: 1.10.0
Affected: 1.10.1
    cpe:2.3:a:openbankproject:obp-api:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
ZAST.AI (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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CVE-2026-90919 (GCVE-0-2026-90919)

Vulnerability from cvelistv5 – Published: 2026-09-14 11:30 – Updated: 2026-09-14 14:24
VLAI
Title
LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization
Summary
LightLLM through 1.2.0 contains a remote code execution vulnerability in the Config Server's unauthenticated /visual_register WebSocket endpoint that passes the first client frame directly to pickle.loads(). Attackers can reach the Config Server port and send a malicious serialized payload with a __reduce__ method to execute arbitrary code with Config Server process privileges.
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 2026-09-14 14:24 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
ModelTC LightLLM Affected: 0 , ≤ 1.2.0 (semver)
Create a notification for this product.
Date Public
2026-09-10 00:00
Credits
Jiapeng Li Jiajia Liu
Show details on NVD website
To clipboard 

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CVE-2026-90777 (GCVE-0-2026-90777)

Vulnerability from cvelistv5 – Published: 2026-09-13 11:42 – Updated: 2026-09-14 17:27
VLAI
Title
ESPnet before 202609 Remote Code Execution via Unsafe Deserialization
Summary
ESPnet before 202609 deserializes pretrained model checkpoints using torch.load with weights_only=False, allowing arbitrary code execution from attacker-supplied files. Attackers can craft malicious checkpoint files that execute code during deserialization when loaded through the initialization or fine-tuning path.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 2026-09-14 17:27 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
espnet espnet Affected: 0 , < 202609 (custom)
Unaffected: 202609 (custom)
Create a notification for this product.
Date Public
2026-08-25 00:00
Credits
Jaime Ramírez (JaimeRamirez-coder) arexgodofwar Snakinya
Show details on NVD website
To clipboard 

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CVE-2026-90614 (GCVE-0-2026-90614)

Vulnerability from cvelistv5 – Published: 2026-09-14 01:45 – Updated: 2026-09-14 15:01
VLAI
Title
FedML-AI FedML MQTT+S3 Communication Backend remote_storage.py S3Storage.read_model deserialization
Summary
A weakness has been identified in FedML-AI FedML up to 0.9.6. Affected by this issue is the function S3Storage.read_model of the file fedml/core/distributed/communication/s3/remote_storage.py of the component MQTT+S3 Communication Backend. This manipulation of the argument s3_key_str causes deserialization. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
6.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 15:01 UTC
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/403196 vdb-entrytechnical-description
https://vuldb.com/vuln/403196/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90614 third-party-advisory
https://vuldb.com/submit/914219 third-party-advisory
https://github.com/FedML-AI/FedML/issues/2267 issue-tracking
https://github.com/FedML-AI/FedML/ product
Impacted products
Vendor Product Version
FedML-AI FedML Affected: 0.9.0
Affected: 0.9.1
Affected: 0.9.2
Affected: 0.9.3
Affected: 0.9.4
Affected: 0.9.5
Affected: 0.9.6
    cpe:2.3:a:fedml-ai:fedml:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Mohammedix88 (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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CVE-2026-90575 (GCVE-0-2026-90575)

Vulnerability from cvelistv5 – Published: 2026-09-13 18:00 – Updated: 2026-09-16 14:13 X_Freeware
VLAI
Title
PHPGurukul Small CRM Login Success login.php unserialize deserialization
Summary
A weakness has been identified in PHPGurukul Small CRM 4.0. This impacts the function unserialize of the file /crm/login.php of the component Login Success Handler. This manipulation of the argument geopluginURL causes deserialization. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is said to be difficult. The exploit has been made available to the public and could be used for attacks.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
3.7 (Low)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 14:13 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
PHPGurukul Small CRM Affected: 4.0
    cpe:2.3:a:phpgurukul:small_crm:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
jdexploit (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2026-90490 (GCVE-0-2026-90490)

Vulnerability from cvelistv5 – Published: 2026-09-13 00:45 – Updated: 2026-09-14 18:15
VLAI
Title
lenve vhr MailReceiver deserialization
Summary
A security flaw has been discovered in lenve vhr 1.0-SNAPSHOT. This issue affects some unknown processing of the component MailReceiver. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
6.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 18:14 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
lenve vhr Affected: 1.0-SNAPSHOT
    cpe:2.3:a:lenve:vhr:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
huluwa888 (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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CVE-2026-87930 (GCVE-0-2026-87930)

Vulnerability from cvelistv5 – Published: 2026-09-09 16:45 – Updated: 2026-09-09 17:24 X_Open Source Unsupported When Assigned
VLAI
Title
MaxSite CMS through 109.6 PHP Object Injection via ci_session
Summary
MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods and corrupt application state or achieve code execution if gadget classes 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: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 17:22 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
MaxSite MaxSite CMS Affected: 0.78 , ≤ 109.6 (custom)
    cpe:2.3:a:max-3000:maxsite_cms:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-09 00:00
Credits
EVIL0RD
Show details on NVD website
To clipboard 

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CVE-2026-87874 (GCVE-0-2026-87874)

Vulnerability from cvelistv5 – Published: 2026-09-09 16:06 – Updated: 2026-09-10 12:50
VLAI
Title
Community.general: community.general: memcached cache plugin deserializes untrusted pickle data from memcached, enabling cache-poisoning remote code execution on the ansible controller
Summary
A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.
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: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 16:58 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-87874 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2530995 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-09-09 00:00
Credits
Red Hat would like to thank Jeon Woochang for reporting this issue.
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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