CVE-2026-56624: Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for clie

Routine

HIGH 7.3WATCHLISTUPGRADE

CVE-2026-56624 is a high-severity flaw (CVSS 7.3) affecting mina sshd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for client-side and server-side SSH. Server-side OpenSSH user certificate validation during user authentication in an Apache MINA SSHD server did not check for the unsupported force-command or verify-required options that could be embedded in the certificate, nor did it validate these options. As a result it was possible that a user could aut

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-295
Published	2026-07-20
Last modified	2026-10-24

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-20 21:16 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

apache mina sshd UPGRADE

Affected: >= 2.0.0 and < 2.19.0 · 3.0.0 m1 · 3.0.0 m2 · 3.0.0 m3 · 3.0.0 m4

Fixed in: 2.19.0

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy mina-sshd || rpm -q mina-sshd || mina-sshd --version

2. UPGRADE to 2.19.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mina-sshd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mina-sshd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison mina-sshd sudo apt install mina-sshd=<VERSION_BEFORE_2.0.0> sudo apt-mark hold mina-sshd

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mina-sshd sudo dnf downgrade mina-sshd-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add mina-sshd

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-56624?

mina sshd: upgrade to 2.19.0. Exact commands for each OS are on this page.

Is CVE-2026-56624 being exploited?

CVE-2026-56624 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-56624 affect?

CVE-2026-56624 affects mina sshd. Severity is high (CVSS 7.3). Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for client-side and server-side SSH. Server-side OpenSSH user certificate validation during user authentication in an Apache MINA SSHD

How urgent is CVE-2026-56624?

Priority 36/100. High severity; On your watchlist

Software pages

OpenSSH vulnerabilities · Java vulnerabilities

Related CVEs

CVE-2026-56623 HIGH 7.1 UPGRADE Path traversal on Windows in Apache MINA SSHD component sshd-git. Apache MINA SSHD is a Java library for clien
CVE-2026-58624 MEDIUM 5.4 UPGRADE Improper input validation in sshd-git in Apache MINA SSHD
CVE-2026-56452 HIGH 7.5 UPGRADE Path traversal in the sshd-scp component of Apache MINA SSHD. Apache MINA SSHD is a Java library for client-si

References

← Back to latest CVEs