CVE-2026-35386
Publication date 2 April 2026
Last updated 29 April 2026
Ubuntu priority
Description
In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line. This requires a scenario where the username on the command line is untrusted, and also requires a non-default configurations of % in ssh_config.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| openssh-ssh1 | 26.04 LTS resolute | Ignored |
| 25.10 questing | Ignored | |
| 24.04 LTS noble | Ignored | |
| 22.04 LTS jammy | Ignored | |
| 20.04 LTS focal | Ignored | |
| 18.04 LTS bionic | Ignored | |
| openssh | 26.04 LTS resolute |
Fixed 1:10.2p1-2ubuntu3.2
|
| 25.10 questing |
Fixed 1:10.0p1-5ubuntu5.4
|
|
| 24.04 LTS noble |
Fixed 1:9.6p1-3ubuntu13.16
|
|
| 22.04 LTS jammy |
Fixed 1:8.9p1-3ubuntu0.15
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Notes
mdeslaur
openssh-ssh1 is only provided for compatibility with old devices that cannot be upgraded to modern protocols. We will not be providing any security support for the openssh-ssh1 package as it is insecure and should be used in trusted environments only.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
3.6 · Low
|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-8222-1
- OpenSSH vulnerabilities
- 29 April 2026