Yes, it can be risky—especially in Live View. When a DSLR is in Live View, the sensor is continuously exposed, and the lens can focus intense sunlight onto it. That concentrated light can create heat and potentially damage the sensor or internal circuitry if you leave the camera pointed at the sun for too long.

One important detail: even if you set the shot to f/22, many lenses stay wide open until the moment the shutter is taken, so the camera may still be receiving much more light while composing.

A quick shot is unlikely to cause damage, but prolonged aiming at the sun is not recommended. Camera manuals often explicitly warn against pointing the camera at the sun or other strong light sources for this reason.

Also be careful with your eyes: looking at the sun through an optical viewfinder is dangerous.

Bottom line: a brief shot probably won’t hurt the camera, but don’t treat it as safe. Avoid prolonged framing in Live View, keep the sun out of the frame when possible, and use proper solar filtration if you intend to photograph the sun directly.