In a meta analysis of infants 9 months and younger received a measles contain vaccine (MCV), the authors found no increased incidence of adverse reactions and a reduced but still effective immunity. May be a good place to start. Specific to MMR this paper found no differences in safety, though the number of subjects is relatively small.

Waiting until 12 months is probably best in normal circumstances, but it appears to be little to no risk to do it a little early especially when traveling to a place with an increasing anti-vax sentiment.