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Ostorlab Blog

Vulnerability research, CVE deep dives and engineering write-ups from the Ostorlab team on AI pentesting and mobile, web and API security testing.

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Before 6.2606.4246, Microsoft Authenticator for Android handed work-account tokens to any app posing as an installed Microsoft app; fixed by the app update.

Deep Dive

Authlib JWS Signature Bypass, Fixed in 1.9.0 (CVE-2026-96760)

Authlib up to 1.8.0 treats a JWS JSON object with empty signatures as verified without checking t...

Oct 27, 2026

Product

How to Vet a Third-Party Mobile App Before You Allow It in Your Company

A five-step mobile app vetting checklist for security teams (permissions, trackers, malware, data...

Oct 27, 2026

Product

Precheck: Know Your Mobile Scan Will Work Before It Runs for Hours

Precheck verifies that a mobile app installs, launches, logs in and runs its UI prompts on a real...

Oct 27, 2026

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Ostorlab vs MobSF (Mobile Security Framework) for mobile app security testing: static and dynamic analysis,...

Oct 07, 2026

Ostorlab vs Oversecured for mobile app security testing: iOS and Android coverage, exploit proof, authentic...

Oct 07, 2026

Ostorlab vs. pentesting firms: cost, testing frequency, depth and remediation, and when to use AI pentests,...

Sep 25, 2026