CVE-2026-12198 Microweber API Endpoint thumbnail_img userfiles_path path traversal
Remote attackers can exploit a path traversal vulnerability in the Microweber API to read arbitrary files from the server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12198?
CVE-2026-12198 is a medium-severity path traversal vulnerability in Microweber, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in Microweber up to 2.0.20. This affects the function userfiles_path of the file /api_nosession/thumbnail_img of the component API Endpoint. Executing a manipulation of the argument cache_path_relative can lead to path traversal. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-22
Which versions are affected by CVE-2026-12198?
2 open source packages ship an affected version, including microweber/microweber.
| Package | Affected | Fixed in |
|---|---|---|
microweber/microweber Packagist | All versions to 2.0.20 | None |
microweber/microweber Packagist | All versions to 2.0.20 | None |
How do I fix CVE-2026-12198?
No fix has been published for CVE-2026-12198 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-12198 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12198 exists.
Sources
Also known as GHSA-vv4x-qcpq-wgrg.