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Fencer Vulns
medium 4.2

CVE-2026-106552 json

In sftp in OpenSSH before 10.6, a server can trigger directory traversal (causing files to be written to unintended locations) during a rec…

published 2026-10-06 33 d ago modified 2026-10-13 26 d ago also EUVD-2026-93994

cvss
4.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

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.

Patch / fix

  • OpenBSD OpenSSH 10.6
  • openssh Debian 14 1:10.6p1-1
  • openssh-gssapi Debian 14 1:10.6p1-1

debian advisories DEBIAN-CVE-2026-106552

  • openssh Ubuntu 22.04 LTS 1:8.9p1-3ubuntu0.18
  • openssh Ubuntu 24.04 LTS 1:9.6p1-3ubuntu13.20
  • openssh Ubuntu 26.10 1:10.5p1-1ubuntu3.1
  • openssh Ubuntu 26.04 LTS 1:10.2p1-2ubuntu3.8
  • openssh-gssapi Ubuntu 26.10 1:10.5p1-1ubuntu3.1

ubuntu advisories UBUNTU-CVE-2026-106552

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssh hummingbird 1 10.5p1-1.2.hum1
  • openssh-keycat hummingbird 1 10.5p1-1.2.hum1
  • openssh-server hummingbird 1 10.5p1-1.2.hum1
  • openssh-askpass hummingbird 1 10.5p1-1.2.hum1
  • openssh-clients hummingbird 1 10.5p1-1.2.hum1
  • openssh-keysign hummingbird 1 10.5p1-1.2.hum1
  • openssh-sk-dummy hummingbird 1 10.5p1-1.2.hum1

red hat advisories RHSA-2026:82247

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-106552 updated cvss 4.2

openssh: openssh: Arbitrary file write via directory traversal during sftp recursive copy

  • Red Hat Enterprise Linux 6 openssh, openssh-ldap, openssh-server, openssh-askpass, openssh-clients, pam_ssh_agent_auth Red Hat Enterprise Linux 7 openssh, openssh-cavs, openssh-ldap, openssh-keycat, openssh-server, openssh-askpass, +3 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 openssh, openssh-cavs, openssh-ldap, openssh-keycat, openssh-server, openssh-askpass, +2 more Red Hat Enterprise Linux 9 openssh, openssh-keycat, openssh-server, openssh-askpass, openssh-clients, pam_ssh_agent_auth
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 10 openssh Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation
  • Red Hat Hardened Images openssh 10.5p1-1.2.hum1, openssh-keycat 10.5p1-1.2.hum1, openssh-server 10.5p1-1.2.hum1, openssh-askpass 10.5p1-1.2.hum1, openssh-clients 10.5p1-1.2.hum1, openssh-keysign 10.5p1-1.2.hum1, +1 more
    fixed: vendor fix RHSA-2026:82247
  • Red Hat Hardened Images openshell
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
32 d ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected products

  • OpenBSD OpenSSH

Classification

Weakness
  • CWE-23 Relative Path Traversal

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.