CVE-2026-86100
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
Camaleon CMS versions 2.7.5 through 2.9.1 fail to validate redirect targets when fetching remote files in the 'Upload from URL' media feature. Authenticated attackers can supply URLs that pass initial validation but redirect to internal network addresses, allowing server-side request forgery to internal services.
Risk Assessment
SSRF attacks can allow access to internal services that should not be externally accessible, potentially leading to data exposure or further attacks on the infrastructure.
Recommendation
Upgrade Camaleon CMS to a version that includes a fix for redirect validation, and restrict access to the URL upload feature to trusted users only.
Other vulnerabilities in Camaleon CMS
See all- CVE-2026-67616Medium
Camaleon CMS up to version 2.9.2 (fixed in commit 88ab703) contains a missing authorization vulnerability on the drafts endpoint. Any authenticated low-privileged user can create draft posts by bypassing role and permission checks, sending requests to the drafts endpoint using only session authentication.
- CVE-2026-66748High
A vulnerability in Camaleon CMS allows an authenticated user with custom field management permissions to execute arbitrary Ruby code. A malicious expression in the select_eval field is evaluated via instance_eval when rendering the post edit page.
- CVE-2026-10715Medium
Camaleon CMS 2.9.2 contains an improper authorization vulnerability in the administrator draft autosave endpoint. A low-privileged authenticated user can send an arbitrary post_id to POST /admin/post_type/<POST_TYPE_ID>/drafts and overwrite the draft associated with another user's post.
- CVE-2026-1776Medium
A path traversal vulnerability in Camaleon CMS versions 2.4.5.0 through 2.9.0 (prior to commit f54a77e) in the AWS S3 uploader implementation. Authenticated users can read arbitrary files from the web server's filesystem by manipulating the 'file' parameter in the download_private_file function.
Original NVD description (English source)
Camaleon CMS versions 2.7.5 through 2.9.1 fail to validate redirect targets when fetching remote files in the Upload from URL media feature. Authenticated attackers can supply URLs that pass initial validation but redirect to internal network addresses, allowing server-side request forgery to internal services.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS