CVE-2026-104774mediumCWE-172CWE-193CWE-693

CVE-2026-104774: fallo de gravedad media en corazawaf coraza

OWASP Coraza WAF: jsDecode Off-by-One in Octal Escape Handling Enables WAF Bypass

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear coraza+ Monitorear github.com/corazawaf/coraza/v2

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 5.8epss 0.3%
OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.0, the t:jsDecode transformation in internal/transformations/js_decode.go:64-70 includes the backslash in the octal buffer, causing ParseInt to fail and return a null byte. The flaw is triggered when a rule relies on t:jsDecode and the request contains JavaScript octal escape sequences. An unauthenticated attacker can encode attack syntax with JavaScript octal escapes so the backend decodes the intended bytes while Coraza rules using t:jsDecode inspect corrupted null-byte output. The mismatch can bypass WAF rules and expose the protected application to attacks such as cross-site scripting or SQL injection. This issue is fixed in version 3.8.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Productos afectados
corazawaf · coraza
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