CVE-2026-115190 An insecure deserialization (PHP object injection) vulnerability exists in Mautic's handling of segment filters and custom field properties.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-115190?
CVE-2026-115190 is a high-severity vulnerability, published on 26 Oct 2026.
Official description
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.
Weakness: CWE-502
Which versions are affected by CVE-2026-115190?
How do I fix CVE-2026-115190?
No fix has been published for CVE-2026-115190 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-115190 being exploited?
There is no known exploitation of CVE-2026-115190 in the wild and no public exploit code.
Sources
Also known as GHSA-5r63-8h35-j3mw.