Yes, it is possible to apply for a K-ETA even if your passport has less than six months of validity remaining.
However, this does not mean that entry into South Korea is guaranteed.
The K-ETA is linked directly to your passport and is only valid until the passport expires.
If your passport expires soon, the K-ETA validity period will be shortened accordingly.
In addition, some airlines and immigration authorities may require a minimum passport validity period (often six months) at the time of departure or entry, regardless of K-ETA approval.
For this reason, travelers are strongly advised to renew their passport before applying for a K-ETA if it is close to expiration.
Doing so helps avoid boarding issues, shortened stay permissions, or possible entry denial at the airport.
To ensure a smooth travel experience, it is best to travel with a passport that has sufficient validity beyond your planned stay.