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bypassing-mobile-pinning

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Diagnose and defeat TLS interception failures in mobile apps — certificate pinning, Android Network Security Config, user-CA distrust, native BoringSSL pinning, and mutual TLS — using objection, Frida, SSL Kill Switch, and APK patching. Use when Burp, mitmproxy, or Charles shows a TLS handshake error, an empty proxy, or "network error" from a mobile app, or when a target is known to pin certificates.

secskills-offense/skills/bypassing-mobile-pinning/SKILL.md

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Sep 4, 2026
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# Bypassing Mobile Pinning

Most time lost here is spent bypassing pinning that was never there. An empty
proxy has at least six causes, and the fix for each is different — one of them
is not pinning at all but Android's default distrust of user CAs, and another
is that the app has its own TLS stack and never saw your proxy. Diagnose
before you reach for a bypass script.

Use only against apps you are authorized to test.

## When to Use

- Burp/mitmproxy/Charles shows a TLS handshake failure from a mobile app
- The proxy shows nothing while the app clearly reaches the network
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