What’s Vulnerable › Vulnerabilities

CVE-2018-20744

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-01-28 · updated 2026-06-17
• Weakness: CWE-346

Description

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: through 1.3.0

References

• http://www.securityfocus.com/bid/106834
• https://github.com/rs/cors/issues/55
• https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf
• http://www.securityfocus.com/bid/106834
• https://github.com/rs/cors/issues/55
• https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf

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