high7.5
CVE-2026-61554
emp3r0r is a C2 designed by Linux users for Linux environments.
Impact
emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 4.2.5, the `http_poll` C2 transport accepts attacker-controlled HTTP polling sessions before CBOR `MsgAuth` authentication is completed. A remote unauthenticated attacker can create arbitrary polling sessions and send request bodies that are forwarded into the C2 dispatch path. This can consume server resources and trigger pre-auth C2 processing. Version 4.2.5 patches the issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/jm33-m0/emp3r0r/core | < 0.0.0-20260531142011-aed3d81641ab | 0.0.0-20260531142011-aed3d81641ab |