What is the sync_cookie_csrf_secondary cookie?
A secondary token used to validate cookie-syncing requests as part of Yandex Metrica's process for matching a visitor's identifier with partner ad networks.
Our October 2026 scan found it on 63 sites (3% of the 2,450 we scanned), set before any consent.
- Purpose
- Analytics
- Belongs to
- Yandex Metrica
- Set as
- Third-party (under another company's domain)
- Typical lifetime
- Under a day
- Where it's common
- 62% of the sites that set it use a .ru domain.
Sites that set sync_cookie_csrf_secondary before consent
The highest-ranked 30 of 63 sites.
- ok.ru6 tracking companies
- ivi.ru10 tracking companies
- bitrix24.ru3 tracking companies
- globalsign.com3 tracking companies
- rt.ru1 tracking company
- livejournal.com11 tracking companies
- aparat.com3 tracking companies
- megafon.ru5 tracking companies
- beboo.ru3 tracking companies
- edna.ru1 tracking company
Show 20 more sites
- jino.ru3 tracking companies
- haberler.com14 tracking companies
- max.ru2 tracking companies
- sondakika.com9 tracking companies
- imgsrc.ru1 tracking company
- kingbokep.tv3 tracking companies
- moe.video3 tracking companies
- 33apk.com1 tracking company
- 1c.ru1 tracking company
- sweb.ru2 tracking companies
- beget.com5 tracking companies
- meb.gov.tr3 tracking companies
- sprinthost.ru5 tracking companies
- mindbox.ru6 tracking companies
- izy0.com1 tracking company
- hh.ru5 tracking companies
- i993.com1 tracking company
- vkvideo.ru4 tracking companies
- mirtesen.ru4 tracking companies
- ucoz.ru3 tracking companies
Related cookies
Other cookies from Yandex Metrica.
How to stop it
Declining non-essential cookies in a site's consent banner should stop sync_cookie_csrf_secondary being set on later visits. Blocking third-party cookies in your browser settings stops the third-party kind everywhere, and clearing cookies for a site removes any it already set.
Description written by CookieTosser, for a cookie the Open Cookie Database doesn't cover.
Understanding this page
- How cookie lifetimes work, and why a 13-month _ga matters
What a cookie's "expires" field actually controls, why Google Analytics ships a 2-year default that many sites cut down to 13 months, and how Safari's 7-day cap on script-set cookies changes the picture.
- First-party vs third-party cookies (and why "first-party" still tracks you)
What the distinction actually means technically, why browsers only block one of the two, and how CNAME cloaking, server-side tagging and cookies like _ga let sites keep tracking under their own domain.
- How to block or limit trackers
Browser privacy settings, content blockers, Global Privacy Control and clearing cookies compared honestly — what each one actually stops, what it doesn't, and what it costs you in return.