User Impersonation Affecting akka.remote package, versions [1.2.0,1.5.52)
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Test your applications- Snyk IDSNYK-DOTNET-AKKAREMOTE-13350886
- published7 Oct 2025
- disclosed6 Oct 2025
- creditAaron Stannard
Introduced: 6 Oct 2025
NewCVE-2025-61778 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade Akka.Remote to version 1.5.52 or higher.
Overview
Akka.Remote is a .NET port of the popular Akka project from the Scala / Java community.
Affected versions of this package are vulnerable to User Impersonation due to improper implementation of certificate-based authentication in the akka.remote.dot-netty.tcp transport. An attacker can gain unauthorized access to a secured cluster by connecting without presenting a valid client certificate, allowing communication with trusted nodes.
Workaround
This vulnerability can be mitigated by avoiding public exposure of the application.