Disclosure summary
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.
Source-reported weakness categories
CWE-696
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Apr
Open original source · Updated Sep 24, 2026
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.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 3.6
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 openssh 9.8p1-5 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 openssh 8.9p1-9 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 openssh 8.9p1-9 on CBL-Mariner 2.0 | (MSRC status code 3) |
Vendor remediation references
- CBL-Mariner Releases · build 9.8p1-6 · product IDs 20632-17084
- Vendor guidance · product IDs 20632-17084
- Release Notes · product IDs 20608-21692
- Vendor guidance · product IDs 20608-21692
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-04-03T21:02:20-04:00
MODIFIED 2026-09-24T22:30:27-04:00
INGESTED 2026-10-08T12:45:03-04:00