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CVE-2026-114099— Coraza 3.0.0 before 3.8.1 WAF Bypass via JSON Key Collision

Quick assessment

Affected
corazawaf coraza
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Coraza 3.0.0 至 3.8.1（不含 3.8.1）版本中存在一个 JSON 请求体处理器漏洞：该处理器将嵌套属性展平为以点号分隔的 ARGS_POST 名称，但未对字面量点号进行转义，导致不同属性发生冲突。未经身份验证的攻击者可添加后续带点号的属性（如 account.role），覆盖恶意嵌套值，从而向 OWASP 核心规则集（CRS）隐藏 SQL 注入载荷，而后端服务仍会接收并处理这些载荷。

CVSS 5.8 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-114099

Vulnerability Information
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Vulnerability Title
Coraza 3.0.0 before 3.8.1 WAF Bypass via JSON Key Collision
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
corazawaf coraza 3.0.0 ~ 3.8.1 -

II. Public POCs for CVE-2026-114099

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III. Intelligence Information for CVE-2026-114099

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Vendor Advisories for CVE-2026-114099 (2)

Same Patch Batch · corazawaf · 2026-10-21 · 3 CVEs total

CVE-2026-114100 5.8 MEDIUM Coraza from 3.0.4 before 3.8.1 Request Body Inspection Bypass via Content-Type
CVE-2026-114101 4.0 MEDIUM Coraza before 3.8.1 Multipart filename* Charset Handling FILES Rule Bypass

IV. Related Vulnerabilities

Same product: coraza
Same vendor: corazawaf
Same weakness: CWE-20

V. Comments for CVE-2026-114099

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