CVE-2018-20744: Go Cors Project Go Cors

Medium severity, CVSS 5.9. EPSS: 0.7% chance of exploitation in the next 30 days.

The Olivier Poitrey Go CORS handler through 1.3.0 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems.

Affected products

• Go Cors Project Go Cors: up to and including 1.3.0

Published 2019-01-28. Last modified 2026-06-17.