Live › vulnerability › CVE-2026-115190
Go to dashboardMautic reads segment filter and custom field values from the database and unserializes them without restricting classes, so a crafted stored value can instantiate arbitrary PHP objects. With gadget chains from Mautic's dependencies, an attacker could potentially run code on the server and read, change or delete contact data.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-26 14:30 UTC. All times on this page are UTC.
Teams running self-hosted Mautic where users with high privileges or write access to segment filters or custom field properties exist. Instances where only trusted administrators can edit segments and fields carry lower practical risk, but the sources do not name affected versions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| mautic/core | packagist | >= 2.15.2, < 5.2.12; >= 6.0.0, < 6.0.10; >= 7.0.0, < 7.2.0 | 5.2.12, 6.0.10, 7.2.0 |
composer show mautic/core (or check the version in Mautic's admin footer/about) and compare: vulnerable if >=2.15.2 and <5.2.12, >=6.0.0 and <6.0.10, or >=7.0.0 and <7.2.05.2.12, 6.0.10 or 7.2.0 (per branch; Mautic 4 users: ELTS)Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
An insecure deserialization (PHP object injection) vulnerability exists in Mautic's handling of segment filters and custom field properties. Several code paths that read these stored values from the database deserialize them without restricting which PHP classes may be instantiated, instead of using Mautic's safe deserialization helper. An attacker who is able to store a crafted serialized value in these segment filter or custom field properties can cause arbitrary PHP objects to be instantiated when Mautic later processes the data, for example during segment evaluation, contact export, or custom field API requests. Combined with gadget chains available in Mautic's dependencies, this could allow an attacker to execute arbitrary code on the server, read, modify, or delete data stored in the Mautic instance, including contact data, and affect its availability. Exploitation requires high privileges or an existing ability to write to the affected stored data.
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