Zumba Json Serializer is a library to serialize PHP variables in JSON format. In versions 3.2.2 and below, the library allows deserialization of PHP objects from JSON using a special @type field. The deserializer instantiates any class specified in the @type field without restriction. When processing untrusted JSON input, this behavior may allow an attacker to instantiate arbitrary classes available in the application. If a vulnerable application passes attacker-controlled JSON into JsonSerializer::unserialize() and contains classes with dangerous magic methods (such as __wakeup() or __destruct()), this may lead to PHP Object Injection and potentially Remote Code Execution (RCE), depending on available gadget chains in the application or its dependencies. This behavior is similar in risk profile to PHP's native unserialize() when used without the allowed_classes restriction. Applications are impacted only if untrusted or attacker-controlled JSON is passed into JsonSerializer::unserialize() and the application or its dependencies contain classes that can be leveraged as a gadget chain. This issue has been fixed in version 3.2.3. If an immediate upgrade isn't feasible, mitigate the vulnerability by never deserializing untrusted JSON with JsonSerializer::unserialize(), validating and sanitizing all JSON input before deserialization, and disabling @type-based object instantiation wherever possible.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Zumba Json Serializer is a library to serialize PHP variables in JSON format. In versions 3.2.2 and below,
    the library allows deserialization of PHP objects from JSON using a special @type field. The deserializer
    instantiates any class specified in the @type field without restriction. When processing untrusted JSON
    input, this behavior may allow an attacker to instantiate arbitrary classes available in the application.
    If a vulnerable application passes attacker-controlled JSON into JsonSerializer::unserialize() and
    contains classes with dangerous magic methods (such as __wakeup() or __destruct()), this may lead to PHP
    Object Injection and potentially Remote Code Execution (RCE), depending on available gadget chains in the
    application or its dependencies. This behavior is similar in risk profile to PHP's native unserialize()
    when used without the allowed_classes restriction. Applications are impacted only if untrusted or
    attacker-controlled JSON is passed into JsonSerializer::unserialize() and the application or its
    dependencies contain classes that can be leveraged as a gadget chain. This issue has been fixed in version
    3.2.3. If an immediate upgrade isn't feasible, mitigate the vulnerability by never deserializing untrusted
    JSON with JsonSerializer::unserialize(), validating and sanitizing all JSON input before deserialization,
    and disabling @type-based object instantiation wherever possible. (CVE-2026-27206)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Zumba Json Serializer is a library to serialize PHP variables in JSON format. In versions 3.2.2 and below,     the library allows deserialization of PHP objects from JSON using a special @type field. The deserializer     instantiates any class specified in the @type field without restriction. When processing untrusted JSON     input, this behavior may allow an attacker to instantiate arbitrary classes available in the application.
    If a vulnerable application passes attacker-controlled JSON into JsonSerializer::unserialize() and     contains classes with dangerous magic methods (such as __wakeup() or __destruct()), this may lead to PHP     Object Injection and potentially Remote Code Execution (RCE), depending on available gadget chains in the     application or its dependencies. This behavior is similar in risk profile to PHP's native unserialize()     when used without the allowed_classes restriction. Applications are impacted only if untrusted or     attacker-controlled JSON is passed into JsonSerializer::unserialize() and the application or its     dependencies contain classes that can be leveraged as a gadget chain. This issue has been fixed in version     3.2.3. If an immediate upgrade isn't feasible, mitigate the vulnerability by never deserializing untrusted     JSON with JsonSerializer::unserialize(), validating and sanitizing all JSON input before deserialization,     and disabling @type-based object instantiation wherever possible. (CVE-2026-27206)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
437876	SCA: security update for zumba/json-serializer (GHSA-v7m3-fpcr-h7m2)	Tenable Cloud Security	SCA Checks	high
437876	SCA: security update for zumba/json-serializer (GHSA-v7m3-fpcr-h7m2)	Tenable Self-Hosted Container Security	SCA Checks	high
299639	Linux Distros Unpatched Vulnerability : CVE-2026-27206	Nessus	Misc.	high

Detections

Analytics

CVE-2026-27206

high

Tenable Plugins

high

high

high