CVE-2026-1642— NGINX vulnerability
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I. Basic Information for CVE-2026-1642
Vulnerability Information
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Vulnerability Title
NGINX vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在可信数据中接受外来的不可信数据
Source: NVD (National Vulnerability Database)
Vulnerability Title
F5 NGINX Plus和F5 NGINX Open Source 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 NGINX Plus和F5 NGINX Open Source都是美国F5公司的产品。F5 NGINX Plus是一个基于软件的应用程序交付平台。F5 NGINX Open Source是一个高性能Web服务器、反向代理服务器、负载均衡器和API网关。 F5 NGINX Plus和F5 NGINX Open Source存在安全漏洞，该漏洞源于配置为代理上游TLS服务器时，可能导致中间人攻击者向响应中注入明文数据。
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 |
|---|---|---|---|---|
| F5 | NGINX Open Source | 1.3.0 ~ 1.29.5 | - | |
| F5 | NGINX Plus | R36 ~ R36 P2 | - |
II. Public POCs for CVE-2026-1642
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://my.f5.com/manage/s/article/K000159824vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-1642
Same Patch Batch · F5 · 2026-02-04 · 5 CVEs total
| CVE-2026-22548 | 5.9 MEDIUM | BIG-IP Advanced WAF and ASM vulnerability |
| CVE-2026-22549 | 4.9 MEDIUM | BIG-IP Container Ingress Services vulnerability |
| CVE-2026-20730 | 3.3 LOW | BIG-IP Edge Client for Windows vulnerability |
| CVE-2026-20732 | 3.1 LOW | BIG-IP Configuration utility vulnerability |
IV. Related Vulnerabilities
Same product: NGINX Open Source
V. Comments for CVE-2026-1642
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