A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libssh | Jul 29, 2026 | Jul 21, 2026 |
| Redhat_linux | — | Upgrade libssh-debugsourceUpgrade libsshUpgrade libssh-configUpgrade libssh-debuginfoUpgrade libssh-devel | Aug 19, 2026 | Jul 21, 2026 |
| Rocky_linux | — | Upgrade libssh-debugsourceUpgrade libsshUpgrade libssh-develUpgrade libssh-debuginfo | Aug 20, 2026 | Aug 18, 2026 |
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