Moderate Vulnerability in nginx:1.24 - Data Injection via Man-in-the-Middle Attack
Summary
ALSA-2026:3638: Moderate: nginx:1.24 security update. Affects nginx versions < 1:1.24.0-5.module_el9.7.0+212+9d3c155a.1.alma.1. Fixed in 1:1.24.0-5.module_el9.7.0+212+9d3c155a.1.alma.1. How to fix ↓
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Background
nginx is a high-performance web and proxy server that supports HTTP and other protocols, designed for high concurrency and low memory usage. It is widely used for serving static content, load balancing, and as a reverse proxy. The recent vulnerability affects nginx versions prior to 1.24.0-5, which may expose users to data injection attacks through TLS proxied connections.
Vulnerability Detail
The vulnerability identified as CVE-2026-1642 allows for data injection via a man-in-the-middle attack on TLS proxied connections. This means that an attacker could intercept and manipulate data being transmitted between the client and the server, potentially leading to unauthorized access to sensitive information or the injection of malicious content.
How To Fix
Minimum fixed version
1:1.24.0-5.module_el9.7.0+212+9d3c155a.1.alma.1
This is the first release that contains the fix.
sudo dnf update nginxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, consider disabling TLS proxied connections until the update can be applied. This can help mitigate the risk of man-in-the-middle attacks while you prepare to update the software.
Conclusion
The nginx vulnerability CVE-2026-1642 poses a significant risk through potential data injection via man-in-the-middle attacks. It is crucial to update to the patched version to safeguard your application and data. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
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FAQ
CVE-2026-1642 is a vulnerability in nginx that allows data injection via man-in-the-middle attacks on TLS proxied connections.
You can check your nginx version by running 'nginx -v' in the terminal. If it is below 1.24.0-5, it is affected.
Failure to update nginx may expose your server to data injection attacks, which can compromise sensitive data and lead to unauthorized access.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using a manifest file like package-lock.json.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
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