What is the severity of CVE-2025-46712?

CVE-2025-46712 is considered to have a high severity due to its impact on the SSH KEX handshake process.

How do I fix CVE-2025-46712?

To fix CVE-2025-46712, update your Erlang/OTP to versions OTP-27.3.4, OTP-26.2.5.12, or OTP-25.3.2.21 or later.

What versions of Erlang/OTP are affected by CVE-2025-46712?

CVE-2025-46712 affects Erlang/OTP versions prior to OTP-27.3.4, OTP-26.2.5.12, and OTP-25.3.2.21.

What functionality is compromised by CVE-2025-46712?

CVE-2025-46712 compromises the enforcement of strict KEX handshake hardening measures in Erlang/OTP SSH.

Is there a workaround for CVE-2025-46712?

There is no publicly documented workaround for CVE-2025-46712; upgrading is the recommended course of action.

Vulnerability/
CVE-2025-46712

low

3.7

CWE

440

8/5/2025

CVE-2025-46712: Erlang/OTP SSH Has Strict KEX Violations

First published: Thu May 08 2025(Updated: )

Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This allows a Man-in-the-Middle attacker to inject these messages in a connection during the handshake. This issue has been patched in versions OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25).

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Erlang/OTP	<OTP-27.3.4<OTP-26.2.5.12<OTP-25.3.2.21

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Frequently Asked Questions

What is the severity of CVE-2025-46712?
CVE-2025-46712 is considered to have a high severity due to its impact on the SSH KEX handshake process.
How do I fix CVE-2025-46712?
To fix CVE-2025-46712, update your Erlang/OTP to versions OTP-27.3.4, OTP-26.2.5.12, or OTP-25.3.2.21 or later.
What versions of Erlang/OTP are affected by CVE-2025-46712?
CVE-2025-46712 affects Erlang/OTP versions prior to OTP-27.3.4, OTP-26.2.5.12, and OTP-25.3.2.21.
What functionality is compromised by CVE-2025-46712?
CVE-2025-46712 compromises the enforcement of strict KEX handshake hardening measures in Erlang/OTP SSH.
Is there a workaround for CVE-2025-46712?
There is no publicly documented workaround for CVE-2025-46712; upgrading is the recommended course of action.

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