Resolved after 1 hour 34 minutes, on March 12, 2026.
We have identified the root cause of the issue as a recently updated Web Application Firewall (WAF) rule. The impact was confined to POST requests containing multipart/form-data payloads with specific data patterns that triggered the WAF rule. Given the nature of the rule, the specific data required to activate it, and the low volume of affected requests, this false positive scenario was not detected during our testing phase. The change has been reverted, and the issue is now fully resolved.
Update timeline
- investigating Mar 12, 2026, 12:59 PM UTC
Some customers are experiencing 403 errors affecting some specific document processing requests. This is impacting a low volume of traffic.
- resolved Mar 12, 2026, 02:33 PM UTC
We have identified the root cause of the issue as a recently updated Web Application Firewall (WAF) rule. The impact was confined to POST requests containing multipart/form-data payloads with specific data patterns that triggered the WAF rule. Given the nature of the rule, the specific data required to activate it, and the low volume of affected requests, this false positive scenario was not detected during our testing phase. The change has been reverted, and the issue is now fully resolved.
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