Outage in Coveralls
"Website under heavy load" warning
Resolved MinorIncident Report
Summary AI Generated
Coveralls experienced a 2.2-hour incident where a second wave of a scraper bot attack triggered "Website under heavy load" warnings, affecting the Coveralls.io Web and API. The attack was broader and three times the volume of the initial wave, involving millions of requests from over 280,000 IP addresses across 12 countries, bypassing standard DDoS protections. A second phase of defense was implemented and proved effective, resolving the incident.
We are currently experiencing occasional "Website under heavy load" warnings.
We believe this is the second wave of an attack we experienced this weekend involving an army of scraper bots which we successfully mitigated. We believe the attacker may have gotten around an initial phase of defense.
Separate from a DDoS attack, these are millions of individual requests coming from over 280K different IP addresses across 12 different countries, so our standard DDoS protection (IP quarantine) does not apply.
We are implementing a second phase of defense and will report updates here.
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Latest Updates ( sorted recent to last )
RESOLVED
2 days ago - at 08/11/2026 09:09PM
This incident has been resolved.
MONITORING
3 days ago - at 08/11/2026 07:55PM
This was the second wave of the attack we experienced this weekend, broadened and tripled in volume. We implemented a second phase of defense which appear to be working and will continue monitoring for the next hour.
INVESTIGATING
3 days ago - at 08/11/2026 07:02PM
We are currently experiencing occasional "Website under heavy load" warnings.
We believe this is the second wave of an attack we experienced this weekend involving an army of scraper bots which we successfully mitigated. We believe the attacker may have gotten around an initial phase of defense.
Separate from a DDoS attack, these are millions of individual requests coming from over 280K different IP addresses across 12 different countries, so our standard DDoS protection (IP quarantine) does not apply.
We are implementing a second phase of defense and will report updates here.
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