CVE-2026-106582: In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicat

Q: How do I fix CVE-2026-106582?

openssh: upgrade to 10.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-106582 being exploited?

CVE-2026-106582 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-2026-106582 affect?

CVE-2026-106582 affects openssh. Severity is low (CVSS 3.7). In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicated by the arXiv 2609.07709 "Crossing the Streams" findings.

Q: How urgent is CVE-2026-106582?

Priority 25/100. Remotely exploitable, no login, no user action; On your watchlist

Routine

LOW 3.7REMOTEWATCHLISTUPGRADE

CVE-2026-106582 is a low-severity flaw (CVSS 3.7) affecting openssh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicated by the arXiv 2609.07709 "Crossing the Streams" findings.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-514
Published	2026-10-06
Last modified	2026-10-13

Publisher (CNA): MITRE · Vendor: openbsd

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-06 21:17 UTCPublished CVE record published
2026-10-13 14:57 UTCUpdated Record last modified

openbsd openssh UPGRADE

Affected: < 10.6

Fixed in: 10.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 10.6 (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-2026-106582?

openssh: upgrade to 10.6. Exact commands for each OS are on this page.

Is CVE-2026-106582 being exploited?

CVE-2026-106582 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-2026-106582 affect?

CVE-2026-106582 affects openssh. Severity is low (CVSS 3.7). In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicated by the arXiv 2609.07709 "Crossing the Streams" findings.

How urgent is CVE-2026-106582?

Priority 25/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

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References

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