Cloudflare Clef disruption on 12 October 2026

Cloudflare Clef full response from Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal: degraded checks; 2026-10-12 12:00 UTC to 2026-10-12 20:00 UTC: peak full response 1.73 s vs a usual 0.44 s.

What our checks saw: Degraded
Cities affected: Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal
When: 12 Oct, 12:00 UTC to 12 Oct, 20:00 UTC
How long: 8 hours
Slowest check: 1.73 s, usually 443 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.

Amsterdam

Each check (UTC)Usual (358 ms)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	346 ms	Normal
09:30	446 ms	Normal
10:00	506 ms	Normal
10:30	608 ms	Slower than usual
11:00	333 ms	Normal
11:30	320 ms	Normal
12:00	1.25 s	Much slower, or failing
12:30	1.53 s	Much slower, or failing
13:00	1.56 s	Much slower, or failing
13:30	1.26 s	Much slower, or failing
14:00	1.25 s	Much slower, or failing
14:30	496 ms	Normal
15:00	315 ms	Normal
15:30	312 ms	Normal
16:00	300 ms	Normal
16:30	602 ms	Slower than usual
17:00	381 ms	Normal
17:30	296 ms	Normal
18:00	417 ms	Normal
18:30	214 ms	Normal
19:00	430 ms	Normal
19:30	700 ms	Slower than usual
20:00	380 ms	Normal
20:30	208 ms	Normal
21:00	205 ms	Normal
21:30	281 ms	Normal
22:00	196 ms	Normal
22:30	688 ms	Slower than usual
23:00	265 ms	Normal

San Francisco

Each check (UTC)Usual (351 ms)Slower than usualMuch slower, or failingIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	394 ms	Normal
09:30	293 ms	Normal
10:00	390 ms	Normal
10:30	388 ms	Normal
11:00	409 ms	Normal
11:30	351 ms	Normal
12:00	1.24 s	Much slower, or failing
12:30	1.29 s	Much slower, or failing
13:00	1.39 s	Much slower, or failing
13:30	1.34 s	Much slower, or failing
14:00	1.50 s	Much slower, or failing
14:30	1.30 s	Much slower, or failing
15:00	433 ms	Normal
15:30	368 ms	Normal
16:00	264 ms	Normal
16:30	560 ms	Slower than usual
17:00	–	No check
17:30	504 ms	No check
18:00	516 ms	Normal
18:30	337 ms	Normal
19:00	334 ms	Normal
19:30	257 ms	Normal
20:00	365 ms	Normal
20:30	519 ms	Normal
21:00	244 ms	Normal
21:30	334 ms	Normal
22:00	349 ms	Normal
22:30	357 ms	Normal
23:00	465 ms	Normal

Montreal

Each check (UTC)Usual (352 ms)Slower than usualMuch slower, or failingIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	406 ms	Normal
09:30	292 ms	Normal
10:00	243 ms	Normal
10:30	437 ms	Normal
11:00	338 ms	Normal
11:30	301 ms	Normal
12:00	1.38 s	Much slower, or failing
12:30	1.22 s	Much slower, or failing
13:00	1.39 s	Much slower, or failing
13:30	1.27 s	Much slower, or failing
14:00	1.25 s	Much slower, or failing
14:30	1.28 s	Much slower, or failing
15:00	408 ms	Normal
15:30	364 ms	Normal
16:00	346 ms	Normal
16:30	566 ms	Slower than usual
17:00	247 ms	Normal
17:30	273 ms	Normal
18:00	471 ms	Normal
18:30	372 ms	Normal
19:00	377 ms	Normal
19:30	321 ms	Normal
20:00	303 ms	Normal
20:30	523 ms	Normal
21:00	304 ms	Normal
21:30	282 ms	Normal
22:00	395 ms	Normal
22:30	368 ms	Normal
23:00	289 ms	Normal

Singapore

Each check (UTC)Usual (652 ms)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	605 ms	Normal
09:30	989 ms	Slower than usual
10:00	751 ms	Normal
10:30	982 ms	Slower than usual
11:00	669 ms	Normal
11:30	597 ms	Normal
12:00	1.73 s	Much slower, or failing
12:30	1.16 s	Slower than usual
13:00	1.49 s	Slower than usual
13:30	1.65 s	Much slower, or failing
14:00	1.62 s	Slower than usual
14:30	402 ms	Normal
15:00	427 ms	Normal
15:30	622 ms	Normal
16:00	404 ms	Normal
16:30	757 ms	Normal
17:00	–	No check
17:30	424 ms	No check
18:00	666 ms	Normal
18:30	348 ms	Normal
19:00	394 ms	Normal
19:30	384 ms	Normal
20:00	356 ms	Normal
20:30	376 ms	Normal
21:00	536 ms	Normal
21:30	373 ms	Normal
22:00	308 ms	Normal
22:30	383 ms	Normal
23:00	339 ms	Normal

Tokyo

Each check (UTC)Usual (443 ms)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	425 ms	Normal
09:30	410 ms	Normal
10:00	960 ms	Slower than usual
10:30	294 ms	Normal
11:00	335 ms	Normal
11:30	393 ms	Normal
12:00	1.34 s	Much slower, or failing
12:30	1.96 s	Much slower, or failing
13:00	1.51 s	Much slower, or failing
13:30	1.43 s	Much slower, or failing
14:00	1.41 s	Much slower, or failing
14:30	1.65 s	Much slower, or failing
15:00	348 ms	Normal
15:30	1.94 s	Much slower, or failing
16:00	450 ms	Normal
16:30	776 ms	Slower than usual
17:00	–	No check
17:30	576 ms	No check
18:00	957 ms	Slower than usual
18:30	436 ms	Normal
19:00	375 ms	Normal
19:30	362 ms	Normal
20:00	323 ms	Normal
20:30	469 ms	Normal
21:00	361 ms	Normal
21:30	439 ms	Normal
22:00	372 ms	Normal
22:30	299 ms	Normal
23:00	397 ms	Normal

Mumbai

Each check (UTC)Usual (980 ms)Slower than usualIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	1.07 s	Normal
09:30	1.21 s	Normal
10:00	756 ms	Normal
10:30	609 ms	Normal
11:00	916 ms	Normal
11:30	659 ms	Normal
12:00	1.33 s	Normal
12:30	1.37 s	Normal
13:00	1.85 s	Slower than usual
13:30	1.37 s	Normal
14:00	1.91 s	Slower than usual
14:30	1.41 s	Normal
15:00	461 ms	Normal
15:30	740 ms	Normal
16:00	634 ms	Normal
16:30	1.34 s	Normal
17:00	–	No check
17:30	405 ms	No check
18:00	724 ms	Normal
18:30	780 ms	Normal
19:00	711 ms	Normal
19:30	927 ms	Normal
20:00	600 ms	Normal
20:30	657 ms	Normal
21:00	434 ms	Normal
21:30	757 ms	Normal
22:00	904 ms	Normal
22:30	1.01 s	Normal
23:00	574 ms	Normal

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