What’s Vulnerable › Vulnerabilities

CVE-2023-40586: go package github.com/corazawaf/coraza is vulnerable to denial of service

• Severity: high (CVSS 7.5 v3.1)
• 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: 2023-08-25 · updated 2026-06-17
• Weakness: CWE-400

Description

OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. Due to the misuse of `log.Fatalf`, the application using coraza crashed after receiving crafted requests from attackers. The application will immediately crash after receiving a malicious request that triggers an error in `mime.ParseMediaType`. This issue was patched in version 3.0.1.

Affected products

• corazawaf coraza: 3.0.0

References

• https://github.com/corazawaf/coraza/commit/a5239ba3ce839e14d9b4f9486e1b4a403dcade8c
• https://github.com/corazawaf/coraza/security/advisories/GHSA-c2pj-v37r-2p6h
• https://github.com/corazawaf/coraza/commit/a5239ba3ce839e14d9b4f9486e1b4a403dcade8c
• https://github.com/corazawaf/coraza/security/advisories/GHSA-c2pj-v37r-2p6h

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