# CVE-2026-106552: In sftp in OpenSSH before 10.6, a server can trigger directory traversal (causing files to be written to unintended locations) during a recursive copy operation.

CVE-2026-106552 is fixed in 21 products on 1 platform, first by openssh-client 1:10.2p1-2ubuntu3.8, released October 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-106552
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 6, 2026
- Weakness: Relative Path Traversal
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-106552

## Description

In sftp in OpenSSH before 10.6, a server can trigger directory traversal (causing files to be written to unintended locations) during a recursive copy operation.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | openssh Debian 14 | 1:10.6p1-1 | [DEBIAN-CVE-2026-106552](https://patchblox.com/security/data/fix/linux/debian-cve-2026-106552.md) | Oct 12, 2026 |
| Linux | openssh amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-client Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.18 | [openssh-client 1:8.9p1-3ubuntu0.18](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openssh-client-1-8.9p1-3ubuntu0.18.md) | Oct 19, 2026 |
| Linux | openssh-client Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.20 | [openssh-client 1:9.6p1-3ubuntu13.20](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openssh-client-1-9.6p1-3ubuntu13.20.md) | Oct 19, 2026 |
| Linux | openssh-client Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [openssh-client 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssh-client-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |
| Linux | openssh-client-gssapi Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [openssh-client-gssapi 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssh-client-gssapi-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |
| Linux | openssh-clients amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-clients-debuginfo amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-debuginfo amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-debugsource amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-gssapi Debian 14 | 1:10.6p1-1 | [DEBIAN-CVE-2026-106552](https://patchblox.com/security/data/fix/linux/debian-cve-2026-106552.md) | Oct 12, 2026 |
| Linux | openssh-keycat amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-keycat-debuginfo amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-server Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.18 | [openssh-server 1:8.9p1-3ubuntu0.18](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openssh-server-1-8.9p1-3ubuntu0.18.md) | Oct 19, 2026 |
| Linux | openssh-server Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.20 | [openssh-server 1:9.6p1-3ubuntu13.20](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openssh-server-1-9.6p1-3ubuntu13.20.md) | Oct 19, 2026 |
| Linux | openssh-server Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [openssh-server 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssh-server-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |
| Linux | openssh-server amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-server-debuginfo amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-server-gssapi Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [openssh-server-gssapi 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssh-server-gssapi-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |
| Linux | openssh-sftp-server Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.18 | [openssh-sftp-server 1:8.9p1-3ubuntu0.18](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openssh-sftp-server-1-8.9p1-3ubuntu0.18.md) | Oct 19, 2026 |
| Linux | openssh-sftp-server Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.20 | [openssh-sftp-server 1:9.6p1-3ubuntu13.20](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openssh-sftp-server-1-9.6p1-3ubuntu13.20.md) | Oct 19, 2026 |
| Linux | openssh-sftp-server Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [openssh-sftp-server 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssh-sftp-server-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |
| Linux | openssh-sk-dummy amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-sk-dummy-debuginfo amzn 2023 | 9.9p1-16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | openssh-tests Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.18 | [openssh-tests 1:8.9p1-3ubuntu0.18](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openssh-tests-1-8.9p1-3ubuntu0.18.md) | Oct 19, 2026 |
| Linux | openssh-tests Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.20 | [openssh-tests 1:9.6p1-3ubuntu13.20](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openssh-tests-1-9.6p1-3ubuntu13.20.md) | Oct 19, 2026 |
| Linux | openssh-tests Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [openssh-tests 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssh-tests-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |
| Linux | pam_ssh_agent_auth amzn 2023 | 0.10.4-10.16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | pam_ssh_agent_auth-debuginfo amzn 2023 | 0.10.4-10.16.amzn2023.0.1 | [ALAS2023-2026-3354](https://patchblox.com/security/data/fix/linux/alas2023-2026-3354.md) | Nov 7, 2026 |
| Linux | ssh Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.18 | [ssh 1:8.9p1-3ubuntu0.18](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ssh-1-8.9p1-3ubuntu0.18.md) | Oct 19, 2026 |
| Linux | ssh Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.20 | [ssh 1:9.6p1-3ubuntu13.20](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ssh-1-9.6p1-3ubuntu13.20.md) | Oct 19, 2026 |
| Linux | ssh Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [ssh 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-ssh-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |
| Linux | ssh-askpass-gnome Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.18 | [ssh-askpass-gnome 1:8.9p1-3ubuntu0.18](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ssh-askpass-gnome-1-8.9p1-3ubuntu0.18.md) | Oct 19, 2026 |
| Linux | ssh-askpass-gnome Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.20 | [ssh-askpass-gnome 1:9.6p1-3ubuntu13.20](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ssh-askpass-gnome-1-9.6p1-3ubuntu13.20.md) | Oct 19, 2026 |
| Linux | ssh-askpass-gnome Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.8 | [ssh-askpass-gnome 1:10.2p1-2ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-ssh-askpass-gnome-1-10.2p1-2ubuntu3.8.md) | Oct 6, 2026 |

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