On 11 November 2026 in Moscow, at the invitation of the Russian side, which holds the CSTO chairmanship, the Secretary General of the Shanghai Cooperation Organisation, Nurlan Yermekbayev, took part in the regular session of the Collective Security Council of the Collective Security Treaty Organization in an expanded format.

The members of the Collective Security Council discussed current issues of ensuring peace and stability in the CSTO collective security regions and summed up the results of the Russian chairmanship of the Organisation. They adopted a decision on the chairmanship of the Republic of Tajikistan in the CSTO in 2027.
On the sidelines of the summit, the SCO Secretary General met with the heads of foreign policy and defence agencies of the SCO Member States.

The Memorandum of Understanding between the SCO and CSTO Secretariats was signed on 5 October 2007 in Dushanbe.
The document defines cooperation on issues of ensuring regional and international security and stability, countering terrorism, combating illicit drug trafficking, suppressing illicit arms trafficking, and countering organised transnational crime.

