While Ukraine CDS were the worst performing worldwide today (http://trueeconomics.blogspot.ie/2014/12/10122014-ukraine-greece-cds-flash-red.html) Russian CDS were also under pressure.
As noted by @ Russian CDS reached above 402 and the implied 5 year cumulative probability of default rose to 24%.
Here's updated chart plotting evolution of Russian and Ukrainian CDS:
There is a strong negative relationship between the price of oil and Russian CDS:
So with oil dipping below USD65/bbl today, things were bound to get touchy.