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Cloudflare Clef slowdown on 18 October 2026

Cloudflare Clef full response from Mumbai, Tokyo, Montreal: slower than usual; 2026-10-18 20:00 UTC to 2026-10-18 21:30 UTC: peak full response 1.4 s vs a usual 0.74 s.

What our checks saw
Slower than usual
Cities affected
Mumbai, Tokyo, Montreal
When
to
How long
90 minutes
Slowest check
1.40 s, usually 742 ms
Cloudflare's status page
Open it

Where our checks saw it

Each glowing city had slow or failing checks during the incident, shown at its worst. We test from 6 cities, so other places may have been hit too.

Our checks, city by city

Each point is one check every 30 minutes, from three hours before the incident to three hours after. Coloured points are the checks we counted as slower or failing. The shaded area shows how far above the usual time they were. Not affected: Amsterdam, San Francisco, Singapore.

Montreal

Incident0 ms400 ms800 ms17:0020:0023:00
Each check (UTC)Usual (340 ms)Slower than usualSlow check outside the incidentIncident
Every check as a table
Time (UTC)CheckReading
17:00459 msNormal
17:30362 msNormal
18:00377 msNormal
18:30278 msNormal
19:00270 msNormal
19:30537 msSlower than usual
20:00576 msSlower than usual
20:30348 msNormal
21:00394 msNormal
21:30310 msNormal
22:00292 msNormal
22:30294 msNormal
23:00323 msNormal
23:30344 msNormal
00:00212 msNormal
00:30334 msNormal

Tokyo

Incident0 ms750 ms1.50 s17:0020:0023:00
Each check (UTC)Usual (405 ms)Slower than usualSlow check outside the incidentIncident
Every check as a table
Time (UTC)CheckReading
17:00275 msNormal
17:30572 msNormal
18:00442 msNormal
18:30517 msNormal
19:00752 msSlower than usual
19:30916 msSlower than usual
20:00368 msNormal
20:30656 msSlower than usual
21:00272 msNormal
21:30415 msNormal
22:00627 msSlower than usual
22:30392 msNormal
23:00787 msSlower than usual
23:30239 msNormal
00:00304 msNormal
00:30366 msNormal

Mumbai

Incident0 ms1.00 s2.00 s17:0020:0023:00
Each check (UTC)Usual (742 ms)Slower than usualSlow check outside the incidentIncident
Every check as a table
Time (UTC)CheckReading
17:00912 msNormal
17:30769 msNormal
18:00932 msNormal
18:30868 msNormal
19:001.16 sSlower than usual
19:301.65 sSlower than usual
20:001.15 sSlower than usual
20:30873 msNormal
21:00337 msNormal
21:30585 msNormal
22:00895 msNormal
22:30679 msNormal
23:00758 msNormal
23:30942 msNormal
00:00875 msNormal
00:30355 msNormal

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