CVE-2026-61554

Published: Sep 15, 2026Modified: Sep 30, 2026Deferred

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-400

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (3)

https://github.com/jm33-m0/emp3r0r/releases/tag/v4.2.5

Source: security-advisories@github.com

https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34

Source: security-advisories@github.com

https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.