CVE-2026-73283: In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tun

Q: How do I fix CVE-2026-73283?

openssh: upgrade to 10.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-73283 being exploited?

CVE-2026-73283 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-73283 affect?

CVE-2026-73283 affects openssh. Severity is low (CVSS 2.5). In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.

Q: How urgent is CVE-2026-73283?

Priority 14/100. On your watchlist

Routine

LOW 2.5WATCHLISTUPGRADE

CVE-2026-73283 is a low-severity flaw (CVSS 2.5) affecting openssh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	2.5 (Low)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 100%)
CISA exploited list	No
Weakness	CWE-670
Published	2026-08-11
Last modified	2026-10-23

Publisher (CNA): MITRE · Vendor: openbsd

Am I affected?

Timeline

2026-08-11 20:18 UTCPublished CVE record published
2026-10-23 20:10 UTCUpdated Record last modified

openbsd openssh UPGRADE

Affected: < 10.5

Fixed in: 10.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openssh || rpm -q openssh || openssh --version

2. UPGRADE to 10.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openssh

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openssh

Note

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

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-2026-73283?

openssh: upgrade to 10.5. Exact commands for each OS are on this page.

Is CVE-2026-73283 being exploited?

CVE-2026-73283 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-2026-73283 affect?

CVE-2026-73283 affects openssh. Severity is low (CVSS 2.5). In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.

How urgent is CVE-2026-73283?

Priority 14/100. On your watchlist

Software pages

OpenSSH vulnerabilities

Related CVEs

CVE-2026-73282 MEDIUM 4.8 UPGRADE In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forward
CVE-2026-73281 LOW 3.5 UPGRADE In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locall

References

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