CVE-2026-1776
MEDIUM6.5EPSS 0.08%Camaleon CMS vulnerable to Path Traversal through AWS S3 uploader implementation
Description
Camaleon CMS versions 2.4.5.0 through 2.9.1, prior to commit f54a77e, contain a path traversal vulnerability in the AWS S3 uploader implementation that allows authenticated users to read arbitrary files from the web server’s filesystem. The issue occurs in the download_private_file functionality when the application is configured to use the CamaleonCmsAwsUploader backend. Unlike the local uploader implementation, the AWS uploader does not validate file paths with valid_folder_path?, allowing directory traversal sequences to be supplied via the file parameter. As a result, any authenticated user, including low-privileged registered users, can access sensitive files such as /etc/passwd. This issue represents a bypass of the incomplete fix for CVE-2024-46987 and affects deployments using the AWS S3 storage backend.
Affected packages (1)
- RubyGems/camaleon_cms>= 2.4.5.0, <= 2.9.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
References (7)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-1776
- PATCHhttps://github.com/owen2345/camaleon-cms
- WEBhttps://camaleon.website
- WEBhttps://github.com/owen2345/camaleon-cms/commit/f54a77e2a7be601215ea1b396038c589a0cab9af
- WEBhttps://github.com/owen2345/camaleon-cms/pull/1127
- WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/camaleon_cms/CVE-2026-1776.yml
- WEBhttps://www.vulncheck.com/advisories/camaleon-cms-aws-uploader-authenticated-path-traversal-arbitrary-file-read