# OpenSSH 10.4 released

> Source: <https://lwn.net/Articles/1081536/>
> Published: 2026-07-06 16:13:19+00:00

# OpenSSH 10.4 released

OpenSSH 10.4 has been released. In addition to a number of security
and bug fixes, there are a few notable changes; this release adds
experimental support for a composite post-quantum signature scheme
combining ML-DSA 44 and Ed25519 as described in [this
IETF draft](https://datatracker.ietf.org/doc/draft-miller-sshm-mldsa44-ed25519-composite-sigs/). With 10.4, if OpenSSH is compiled with sandbox support
it will fail on Linux systems that have not enabled `SECCOMP`
or `NO_NEW_PRIVS`; prior to this release, ` sshd` would log an error
but continue operation. See the

[release notes](https://www.openssh.org/txt/release-10.4)for a full list of changes.