On this page
CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Weakness Summary
The product receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.
- Canonical source: MITRE CWE-113 (opens in a new tab)
- Published Atomicorp CVE observations: 3
- Distinct affected products in those observations: 3
- Active Atomicorp rules associated with this weakness: 4
Atomicorp Research Context
Atomicorp has published CVE-specific research observations associated with this weakness category. Each linked CVE page states whether the tested request was detected or blocked and is the authoritative customer-facing finding.
The CVEs and rules shown here are selected published examples, not a complete list of Atomicorp protections. If a CWE, CVE, or rule is absent from this page, no conclusion should be drawn about whether Atomicorp protects against that weakness or attack method.
A CWE describes a class of software weakness. It does not identify one exploit request, and association with a CWE does not mean that every vulnerability or exploitation path in that category is detected or blocked.
Selected Published CVE Observations
| CVE | Vulnerability | Product | Atomicorp finding | Observed rules |
|---|---|---|---|---|
| CVE-2024-52875 | Kerio Control v9.2.5 - CRLF Injection | kerio control | Attack Blocked by Atomicorp | 390716 |
| CVE-2018-16979 | Monstra CMS 3.0.4 - HTTP Header Injection | monstra | Attack Blocked by Atomicorp | 330708 , 390722 |
| CVE-2026-42578 | Netty: HTTP Header Injection via HttpProxyHandler Disabled Validation | netty | Attack Blocked by Atomicorp | 390719 |
Associated Atomicorp WAF Rules
| Rule | Status | Behavior |
|---|---|---|
| 330708 | Active | disruptive (deny) |
| 390716 | Active | disruptive (deny) |
| 390719 | Active | disruptive (deny) |
| 390722 | Active | disruptive (deny) |
Related MITRE CAPEC Context
MITRE associates this CWE with the following attack-pattern entries. These taxonomy relationships are context, not Atomicorp coverage claims:
CAPEC-105 (opens in a new tab) , CAPEC-31 (opens in a new tab) , CAPEC-34 (opens in a new tab) , CAPEC-85 (opens in a new tab)