---
id: CVE-2026-106582
title: >-
  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.
summary: >-
  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.
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-514
  - CWE-205
vendor: openbsd
product: openssh
affected:
  - openssh < 10.6
patched:
  - openssh 10.6
published: '2026-10-06'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:57:12.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106582'
references:
  - url: 'https://arxiv.org/abs/2609.07709'
    label: cve@mitre.org
  - url: 'https://www.openssh.org/releasenotes.html#10.6'
    label: cve@mitre.org
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106582.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-106582'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2547181'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-106582'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106582'
  - url: 'https://access.redhat.com/errata/RHSA-2026:82247'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00183
epssPercentile: 0.07775
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T14:05:18.589106Z'
ingestedAt: '2026-10-06T21:20:28.988Z'
---

## Overview

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.

## Affected

- `openssh < 10.6`

## Remediation

Upgrade past the affected range:

- `openssh 10.6`

## Vendor advisories

- **RHSA-2026:82247** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82247)
- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106582.json)