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3.3
CVE-2026-106587: OpenSSH <10.6 may read a file instead of disabling feature
CVE-2026-106587 · published 12 days ago
Summary
Versions of OpenSSH prior to 10.6 treat the word "none" as if it were a filename, even though it should turn a setting off. This can cause the server to try to open or read an unintended file, potentially leading to errors or exposure of information. Update OpenSSH to version 10.6 or later, or avoid using "none" in the configuration.
What to do
- Update bellsoft openssh to version 9.1_p1-r16.
- Update bellsoft openssh to version 10.6_p1-r0.
- Update openssh to version 9.1_p1-r16.
- Update openssh to version 10.6_p1-r0.
- Update canonical openssh to version 1:8.9p1-3ubuntu0.18.
- Update canonical openssh to version 1:9.6p1-3ubuntu13.20.
- Update canonical openssh to version 1:10.2p1-2ubuntu3.8.
- Update openbsd openssh to version 10.6 or later.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:Pro:14.04:LTS | canonical | openssh | All versions |
| Ubuntu:18.04:LTS | canonical | openssh-ssh1 | All versions |
| – | openbsd | openssh | < 10.6 |
| Debian:12 | debian | openssh | All versions |
| Debian:14 | debian | openssh-gssapi | All versions |
| Alpaquita:23 | bellsoft | openssh |
>= 9.1_p1-r3, < 9.1_p1-r16 Fix: upgrade to 9.1_p1-r16
|
| Alpaquita:25 | bellsoft | openssh |
>= 10.0_p1-r7, < 10.6_p1-r0 Fix: upgrade to 10.6_p1-r0
|
| Alpaquita:stream | bellsoft | openssh |
>= 9.3_p1-r7, < 10.6_p1-r0 Fix: upgrade to 10.6_p1-r0
|
| BellSoft Hardened Containers:23 | – | openssh |
>= 9.1_p1-r3, < 9.1_p1-r16 Fix: upgrade to 9.1_p1-r16
|
| BellSoft Hardened Containers:25 | – | openssh |
>= 10.0_p1-r7, < 10.6_p1-r0 Fix: upgrade to 10.6_p1-r0
|
| BellSoft Hardened Containers:stream | – | openssh |
>= 9.3_p1-r7, < 10.6_p1-r0 Fix: upgrade to 10.6_p1-r0
|
| Ubuntu:22.04:LTS | canonical | openssh |
< 1:8.9p1-3ubuntu0.18 Fix: upgrade to 1:8.9p1-3ubuntu0.18
|
| Ubuntu:24.04:LTS | canonical | openssh |
< 1:9.6p1-3ubuntu13.20 Fix: upgrade to 1:9.6p1-3ubuntu13.20
|
| Ubuntu:26.10 | canonical | openssh-gssapi | All versions |
| Ubuntu:26.04:LTS | canonical | openssh |
< 1:10.2p1-2ubuntu3.8 Fix: upgrade to 1:10.2p1-2ubuntu3.8
|
Original advisory text
BELL-CVE-2026-106587
In sshd in OpenSSH before 10.6, the value "none" for a configuration option is sometimes interpreted as a filename but was intended to mean that a feature is disabled.
References
- https://security-tracker.debian.org/tracker/CVE-2026-106587 Vendor Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-1065... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-106587 Vendor Advisory
- https://docs.bell-sw.com/security/cves/CVE-2026-106587 Vendor Advisory
- https://ubuntu.com/security/CVE-2026-106587 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-106587 Third Party Advisory
- https://www.openssh.org/releasenotes.html#10.6 Third Party Advisory
- https://ubuntu.com/security/notices/USN-8928-1 Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Severity
3.3
Low
Type
CWE-843Type Confusion
Timeline
Published7 Oct 2026
Updated17 Oct 2026
First seen6 Oct 2026
Sources
CVE-2026-106587 · NVD
UBUNTU-CVE-2026-106587 · OSV
CVE-2026-106587 · MITRE
DEBIAN-CVE-2026-106587 · OSV
BELL-CVE-2026-106587 · OSV
CVE-2026-106587 · OSV
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