---
id: CVE-2026-114099
title: Coraza 3.0.0 before 3.8.1 WAF Bypass via JSON Key Collision
summary: >-
  Coraza from 3.0.0 before 3.8.1 has a JSON body processor that flattens nested
  properties into dot-separated ARGS_POST names without escaping literal dots,
  so distinct properties collide. Unauthenticated attackers can add a later
  dotted p…
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-20
vendor: corazawaf
product: coraza
affected:
  - coraza >= 3.0.0 < 3.8.1
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T00:37:01.866Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114099'
references:
  - url: >-
      https://github.com/corazawaf/coraza/security/advisories/GHSA-5gj4-9gm7-2fx2
    label: GitHub Security Advisory (GHSA-5gj4-9gm7-2fx2)
  - url: >-
      https://www.vulncheck.com/advisories/coraza-3.0.0-before-3.8.1-waf-bypass-via-json-key-collision
    label: >-
      VulnCheck Advisory: Coraza 3.0.0 before 3.8.1 WAF Bypass via JSON Key
      Collision
tags:
  - cve.org
ingestedAt: '2026-10-21T01:37:08.016Z'
---

## Overview

Coraza from 3.0.0 before 3.8.1 has a JSON body processor that flattens nested properties into dot-separated ARGS_POST names without escaping literal dots, so distinct properties collide. Unauthenticated attackers can add a later dotted property such as account.role that overwrites a malicious nested value, hiding SQL injection payloads from OWASP CRS rules while backends still receive them.

## Affected

- `coraza >= 3.0.0 < 3.8.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.