Cloudflare

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API Shield JWT Validation Errors

Updated 6 Oct 2026, 00:45 UTC

Resolved 10:55Started 2Timeline events

Confirmed by the official source.

Executive summary

Summary
Cloudflare officially reported degraded performance affecting API Shield JWT validation for customers using symmetric keying material. The provider later reported that a fix had been implemented and that it was monitoring the results.

What users experienced

User impact
Customers using symmetric keying material may have experienced API Shield JWT validation errors.

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Started

10:555 Oct 2026

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Timeline events

Timeline of the incident

5 Oct 2026, 10:58 UTC
Detection
Confirmed by an official service source.
6 Oct 2026, 00:45 UTC
Resolution
The service is no longer reporting this incident as active.

What we know

✓Cloudflare reported the issue as affecting API Shield JWT validation for customers using symmetric keying material.
✓The affected API Shield component was reported as degraded performance.
✓Cloudflare stated that the issue had been identified and a fix was being implemented.
✓Cloudflare later reported that the fix had been implemented and that results were being monitored.