Vulnerability · Published May 13, 2026 · Assigned by GitHub_M
CVE-2026-45053CubeCart: Authenticated Arbitrary File Upload to RCE in REST Files API
Critical 9.1
In plain English
A critical-severity unrestricted file upload in v6 from cubecart. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Official description
CubeCart is an ecommerce software solution. Prior to 6.7.0, an Authenticated Arbitrary File Upload vulnerability exists in the REST API File Manager endpoint (POST /api/v1/files) of CubeCart. The endpoint allows any holder of an API key with files:rw permission to upload PHP source files into the web-accessible images/source/ directory, where they are executed by the web server. Combined with a path-traversal flaw in the same endpoint's filepath parameter, a single API request writes a webshell anywhere the webserver process can write — including the document root — yielding full Remote Code Execution. This vulnerability is fixed in 6.7.0.
Affected products (as reported)
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/cubecart/v6/security/advisories/GHSA-652f-8c88-25cx x_refsource_CONFIRM