CVE-2026-9559: Mautic/core Path Traversal Vulnerability

CRITICAL
Advisory Identifier: GHSA-6r9h-4h75-7q4x
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CVSS 9.9
CWE-98 CWE-73 CWE-22
Published
Advisory Summary

CVE-2026-9559 is a CRITICAL (CVSS 9.9) path traversal vulnerability (CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')) affecting Mautic/core libraries in the Packagist ecosystem. The issue involves mautic vulnerable to path traversal via campaign import. Remediation is available by upgrading affected packages to version 7.1.2.

CVE-2026-9559 at a Glance

CVE Identifier CVE-2026-9559
GHSA Identifier GHSA-6r9h-4h75-7q4x
Severity CRITICAL
CVSS v3.1 Base Score 9.9
CWE Classification CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Affected Product Mautic/core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-9559

To remediate this vulnerability, upgrade all affected Mautic/core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mautic/core fixed: 7.1.2 
Upgrade mautic/core to 7.1.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for mautic/core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-9559, inspect your project dependencies for Mautic/core:

inspect dependencies for mautic/core

Analyze the terminal output to locate any version of Mautic/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.1.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion'), where the php application receives input from an upstream component, but it does not restrict or incorrectly restricts the input before its usage in "require," "include," or similar functions. In Mautic/core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary A path traversal vulnerability exists in the campaign import feature of Mautic 7. When extracting uploaded ZIP files during campaign imports, a flaw in the validation logic allows file paths to escape the intended temporary directories. ### Impact An authenticated user with campaign import privileges (`campaign:imports:create`) can write arbitrary PHP files to sensitive system directories. An attacker can exploit this to overwrite critical internal configuration or cache components, resulting in Remote Code Execution (RCE) under the context of the web server user. ### Patched Versions This security issue has been addressed in the following release: * **7.1.2** *Note: Mautic 6.x, 5.x, and 4.x branches are not affected by this vulnerability. For general security support regarding legacy Mautic 4 releases, please refer to the [ELTS](https://mautic.org/extended-long-term-support-elts/) page.* ### Workarounds There are no official workarounds. To mitigate this risk without upgrading, revoke campaign import permissions (`campaign:imports:create`) from non-administrative users.

CVE-2026-9559 Affected Mautic/core Versions

1 component(s)
Fixed Versions:
7.1.2
Product / Package Ecosystem Affected Versions Fixed Version
mautic/core
 Packagist
≥ 7.0.0
< 7.1.2
7.1.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mautic/mautic/security/advisories/GHSA-6r9h-4h75-7q4x
NVD — CVE-2026-9559 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9559
Mautic/core Source Repository REPOSITORY
https://github.com/mautic/mautic

Frequently Asked Questions

What is CVE-2026-9559?
CVE-2026-9559 is a security vulnerability in Mautic/core involving Mautic vulnerable to Path Traversal via Campaign Import under CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion').
Which Mautic/core versions are affected?
Affected versions include releases prior to 7.1.2 across affected packages: mautic/core.
What version fixes CVE-2026-9559?
Upgrading to 7.1.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mautic/core affected?
Yes, mautic/core is affected in releases prior to 7.1.2. Upgrade your dependency to 7.1.2 or later.
What is the CVSS score of CVE-2026-9559?
CVE-2026-9559 has a CVSS v3.1 base score of 9.9 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-9559?
CVE-2026-9559 is classified under CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') (The PHP application receives input from an upstream component, but it does not restrict or incorrectly restricts the input before its usage in "require," "include," or similar functions.).
How can I check Packagist dependencies for CVE-2026-9559?
Run the dependency tree command: 'inspect dependencies for mautic/core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6r9h-4h75-7q4x",
  "modified" : "2026-07-02T19:48:50Z",
  "published" : "2026-07-02T19:48:50Z",
  "aliases" : [ "CVE-2026-9559" ],
  "summary" : "Mautic vulnerable to Path Traversal via Campaign Import",
  "details" : "### Summary\nA path traversal vulnerability exists in the campaign import feature of Mautic 7. When extracting uploaded ZIP files during campaign imports, a flaw in the validation logic allows file paths to escape the intended temporary directories. \n\n### Impact\nAn authenticated user with campaign import privileges (`campaign:imports:create`) can write arbitrary PHP files to sensitive system directories. An attacker can exploit this to overwrite critical internal configuration or cache components, resulting in Remote Code Execution (RCE) under the context of the web server user.\n\n### Patched Versions\nThis security issue has been addressed in the following release:\n* **7.1.2**\n\n*Note: Mautic 6.x, 5.x, and 4.x branches are not affected by this vulnerability. For general security support regarding legacy Mautic 4 releases, please refer to the [ELTS](https://mautic.org/extended-long-term-support-elts/) page.*\n\n### Workarounds\nThere are no official workarounds. To mitigate this risk without upgrading, revoke campaign import permissions (`campaign:imports:create`) from non-administrative users.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "mautic/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.1.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mautic/mautic/security/advisories/GHSA-6r9h-4h75-7q4x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-9559"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mautic/mautic"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-73", "CWE-98" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-02T19:48:50Z",
    "nvd_published_at" : "2026-05-29T12:16:26Z"
  }
}