CVE-2026-9559 Mautic vulnerable to Path Traversal via Campaign Import
Authenticated users can exploit path traversal in campaign imports to write arbitrary PHP files, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-9559?
CVE-2026-9559 is a critical path traversal vulnerability in mautic/core, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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. 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.
Which versions are affected by CVE-2026-9559?
2 open source packages ship an affected version, including mautic/core.
| Package | Affected | Fixed in |
|---|---|---|
mautic/core Packagist | From 7.0.0 | 7.1.2 |
mautic/core Packagist | From 7.0.0 | 7.1.2 |
How do I fix CVE-2026-9559?
Upgrade mautic/core to 7.1.2 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-9559 being exploited?
There is no known exploitation of CVE-2026-9559 in the wild and no public exploit code.
Sources
Also known as GHSA-6r9h-4h75-7q4x.