CVE-2026-61554
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductGithub.com/jm33-m0/emp3r0r/core
PublishedSep 15, 2026
First seenSep 15, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- github.com/jm33-m0/emp3r0r/core0.0.0-20260531142011-aed3d81641ab or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/jm33-m0/emp3r0r/coreGo | v < 0.0.0-20260531142011-aed3d81641ab | 0.0.0-20260531142011-aed3d81641ab |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.