Major incident

Circle: CCTP Attestations - Delays/Degraded Performance

Oct 21, 2026, 19:46 UTC

started

21:35 UTC

resolved

1 h 48 min

duration

Affected: Attestation Service

Current status of Circle: Partial outage — live Circle status

Timeline

Oct 21, 2026, 19:46 UTC
investigating
We have identified an issue causing delays or degraded performance on Circle's Cross-Chain Transfer Protocol (CCTP) attestation service for transfers originating from Ethereum Virtual Machine (EVM)-compatible source blockchains. Some customers may experience slower transaction confirmations or partial unavailability. Our team is investigating the root cause and working to restore normal operation as soon as possible.
Oct 21, 2026, 21:35 UTC
resolved
This incident has been resolved.

Updates as published by Circle (original).

This was part of a wider event: 109 services reported incidents within the hour.

LogicMonitor 20:45 UTC · LogicMonitor is currently investigating potential impacts to our Account Access Component(s).
Parchment 20:45 UTC · Instructure is aware of CVE-2026-109618 and CVE-2026-109619 (referred to as "PHP2Shell"), affecting PHP.
Instructure 20:43 UTC · PHP awareness
Kandji 20:37 UTC · Slow Load Times in the Iru Web App
impact.com 20:23 UTC · General Reporting Delay - Actions only (Tracking Unaffected)
UserTesting 20:12 UTC · Tree Test and Card Sort
Kaseya 20:08 UTC · RocketCyber - EU Region - Pages loading slow or not at all
Lightspeed Systems 20:07 UTC · PHP Security Update
Paddle 20:04 UTC · Issue affecting metrics and reporting in the seller dashboard
SEVENROOMS 19:50 UTC · SevenRooms OS – Delayed Real-Time Updates Due to Google Firebase Incident
Anthropic (Claude) 19:49 UTC · Degraded performance for Claude Fable 5
UVic IT 19:45 UTC · Critical Security Vulnerability Affecting UVic Services
HackerOne 19:45 UTC · Slow response times and report sidebar outage
uchicago 19:43 UTC · Web Service Outage
OpenText 19:37 UTC · Core US services were unavailable