Incorrect Behavior Order: Validate Before Canonicalize Affecting owasp-modsecurity/ModSecurity package, versions [,3.0.16)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published11 Jul 2026
- disclosed11 Jul 2026
- creditUnknown
Introduced: 11 Jul 2026
CVE-2026-52747 (opens in a new tab)How to fix?
Upgrade owasp-modsecurity/ModSecurity to version 3.0.16 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Behavior Order: Validate Before Canonicalize through the multipart request body parser, which removes embedded line breaks from non-file form-field values before exporting them to ARGS and ARGS_POST. An attacker can bypass request-body inspection rules by crafting payloads that rely on preserved line breaks to evade detection.