Study of diboson production at CMS

I present an overview of the measurements of the diboson ($WW$, $WZ$, $ZZ$, $W\gamma$ , and $Z\gamma$ ) production cross sections in proton-proton collisions at ps = 7 TeV. The measurements are based on 36 pb${}^{-1}$ and 1.1 fb${}^{-1}$ of data collected with the CMS detector at the LHC in 2010 and 2011, respectively. The vector bosons $W$ and $Z$ are reconstructed in purely leptonic decays. The measured cross sections are compared with the Standard Model expectations calculated at next-to-leading order in perturbative QCD. Limits on anomalous triple gauge boson couplings are derived.