---
title: "CVE-2026-115190: Mautic - Insecure Deserialization"
description: "Mautic contains an insecure deserialization vulnerability caused by unsafe deserialization of segment filters and custom field properties, letting attackers with write access execute arbitrary code and manipulate data."
url: https://panop.io/threat-heartbeat/CVE-2026-115190/
---

# CVE-2026-115190 Mautic - Insecure Deserialization

Mautic contains an insecure deserialization vulnerability caused by unsafe deserialization of segment filters and custom field properties, letting attackers with write access execute arbitrary code and manipulate data.

CVSS base score 8.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-115190)

## Details

Type

Insecure Deserialization

Impact

Remote Code Execution, Information Disclosure, Data Tampering, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-502](https://cwe.mitre.org/data/definitions/502.html)

## Vendor fix

Update to the latest version with safe deserialization fixes.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-115190](https://nvd.nist.gov/vuln/detail/CVE-2026-115190)
- [https://github.com/mautic/mautic/security/advisories/GHSA-5r63-8h35-j3mw](https://github.com/mautic/mautic/security/advisories/GHSA-5r63-8h35-j3mw)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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