"Survival temperature" isn't a well-defined term, which is why you can't find it in a datasheet.
Assuming you don't have any issues due to thermal expansion of the PCB (which the capacitor manufacturer can't know), the main symptom you'll see at high temperature is increased leakage current and poor insulation resistance. This effect, and how much of it persists after cooling down, will depend a great deal on the bias voltage and humidity at the time. For a supply bypassing capacitor this may not be an issue, but that depends on your application.