EUVD-2026-18400CVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionNVD
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.
AnalysisAI
OpenSSH before version 10.3 allows local privilege escalation through shell metacharacter injection in usernames when non-default ssh_config token expansion (%) is enabled. A local authenticated attacker with limited privileges can execute arbitrary commands by crafting a malicious username containing shell metacharacters, provided the system administrator has configured ssh_config to expand user-controlled tokens. …
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External POC / Exploit Code
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