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 P…
Exact source revision recorded 30 Oct 2026 01:50:14 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-97825
PublishedOWASP 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.
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Original publisher date fields
datePublished: Oct 12, 2026, 7:58:39 PM
dateUpdated: Oct 13, 2026, 3:56:59 PM
- Source published
- Oct 12, 2026, 7:58:39 PM (timezone not stated)
- Source modified
- Oct 13, 2026, 3:56:59 PM (timezone not stated)
- Observed here
- 30 Oct 2026 01:50:14 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
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EUVD CVSS 3.1 · 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N