CVE-2026-6994— Envoy Query Parameter header_mutation.cc params.add injection
Quick assessment
Affected
n/a Envoy
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.
Envoy Proxy是Envoy Proxy开源的一个云原生高性能边缘/中间/服务代理。 Envoy Proxy 1.33.0及之前版本存在注入漏洞，该漏洞源于组件Query Parameter Handler中文件source/extensions/filters/http/header_mutation/header_mutation.cc的函数params.add，可能导致注入。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-6994
Vulnerability Information
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Vulnerability Title
Envoy Query Parameter header_mutation.cc params.add injection
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in Envoy up to 1.33.0. Affected is the function params.add of the file source/extensions/filters/http/header_mutation/header_mutation.cc of the component Query Parameter Handler. This manipulation causes injection. Remote exploitation of the attack is possible. Patch name: f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4. It is suggested to install a patch to address this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Envoy Proxy 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy Proxy是Envoy Proxy开源的一个云原生高性能边缘/中间/服务代理。 Envoy Proxy 1.33.0及之前版本存在注入漏洞，该漏洞源于组件Query Parameter Handler中文件source/extensions/filters/http/header_mutation/header_mutation.cc的函数params.add，可能导致注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | Envoy | 1.0 | - |
|
II. Public POCs for CVE-2026-6994
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · n/a · 2026-04-25 · 5 CVEs total
| CVE-2026-6951 | 9.8 CRITICAL | Simple Git 代码注入漏洞 |
| CVE-2026-6987 | 7.3 HIGH | PicoClaw Web Launcher Management Plane restart command injection |
| CVE-2026-6983 | 4.7 MEDIUM | pagekit download server-side request forgery |
| CVE-2026-6978 | 4.7 MEDIUM | JiZhiCMS addcache.html htmlspecialchars_decode sql injection |
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