Cookie database › PubMatic

KCCH cookie

Marketing cookie set by PubMatic, lasting 30 secs.

Is KCCH firing on your site before anyone says yes?

Conzent holds KCCH and every other marketing cookie until the visitor accepts, and Consent Mode v2 keeps your Google Ads and GA4 reporting accurate. Registered IAB TCF CMP, Google-certified. From €7 per site a month.

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What the KCCH cookie does

To avoid race condition in PubMatic userId generation, showad.js / universalpixel.js set this cookie first. if and only if not set already. Existence of this cookie means that current flow of the execution should not generate PubMatic userId cookie, as its already being set by other flow which has set KCCH.

Who sets it

Consent category: marketing

Marketing cookies follow visitors across sites to build advertising profiles and to measure campaigns. They always require prior consent, and a consent banner has to block them until the visitor agrees.

NameKCCH
CategoryMarketing
Lifetime30 secs
Set byPubMatic

Other cookies from the same vendor

Is this cookie on your site?

Conzent's scanner lists every cookie your site sets, classifies each one the way this page does, and shows which are set before the visitor has consented. Try Conzent free for 14 days, or look up another cookie.

From the Conzent cookie database, last updated 2026-11-12. Descriptions come from vendor documentation, cookie policies and our own scans; write to support@getconzent.com to correct one.