iOS Application Security Posture Kit

"iOS is just more secure" does not hold at the app level. The platform's sandboxing, code signing and App Store review are stronger by default than Android's — and a 2026 analysis of over 150,000 apps still found critical CVEs in third-party components in roughly one iOS app in eight, slightly more than Android. The same 2025 study that found 815,000 hardcoded secrets across 156,000 shipped apps found them on both platforms. App Store review does not catch a hardcoded key any more than Play Protect does.

The standout finding is a decade old. App Transport Security has been mandatory since iOS 9 in 2015, requiring TLS 1.2 or better. Ten years later, developers are still explicitly bypassing a secure default with NSAllowsArbitraryLoads and exception domains, and it remains one of the most-cited iOS findings. File 03 gives ATS exceptions their own surface.

Scored against OWASP's own standard. This kit assesses an iOS app against the OWASP Mobile Application Security Verification Standard v2.0 and the current Mobile Top 10, with controls mapped to iOS's own mechanisms — Keychain accessibility classes, Secure Enclave, App Transport Security, App Attest, and Info.plist and entitlement configuration — and every hardening row carrying its MASVS control reference. It is a configuration and architecture posture assessment, not a penetration test.

The fix takes weeks to land. A hardcoded-secret fix needs a new build, App Store review, and update adoption that can take months to reach most users. That asymmetry is why a pre-launch review matters more on mobile than on any server-side platform.

What you get

01 Assessment Methodology (DOCX) — why App Store review does not catch app-level bugs, MASVS v2.0 and the Mobile Top 10 as the backbone, the five modules, run order, cross-links and assumptions.

02 Identity & Access Review Workbook (XLSX) — Session Handling (every protected call re-validated server-side), Keychain & Secure Enclave (accessibility classes matched to sensitivity, hardware-backed keys, biometric binding), Modern Auth Adoption (Face ID and Touch ID through LocalAuthentication, passkeys) and Entitlements & Platform Trust, rolling into one identity posture score.

03 Blast Radius Scoring Tool (XLSX) — the flagship module. Four surfaces plus detection — local data storage, hardcoded secrets & keys, ATS exceptions & entitlements, binary protection & App Attest — resolving to one score, a band on the same bands as the Android kit, and a closure list ranked by risk-weighted points. Local storage and hardcoded secrets carry the highest weights.

04 MASVS-Aligned Hardening Checklist (XLSX) — Storage & Crypto, Network & Auth, Platform Interaction, and Resilience / Code / Privacy, each row with its MASVS v2.0 reference, scored gap-to-target with a hardening percentage per family.

05 Data Governance Review (DOCX) — what the app actually collects and where it is stored, third-party SDK data-sharing behaviour, iCloud backup and sync exposure, and whether the App Store privacy label matches reality.

06 Detection Readiness Matrix (XLSX) — crash reports and whether they leak, App Store Connect analytics, integrity verification of resigned IPAs, anomalous client API patterns, jailbreak-detection bypass, and Keychain or entitlement misuse from another app or extension. A mobile app has no built-in audit log, so this module scores low by design and says so.

07 Executive Summary Template (DOCX) — one page: the four module scores, top five findings, plain-language meaning, remediation timeline, and the note to run the Android kit alongside if the product ships on both.

ios01.json — scoring bands, surfaces, MASVS groups and the module map.

A worked example throughout. Harrowgate Wallet, a fictional iOS-only personal-finance app that links external bank accounts through a third-party aggregator, with an account-linking token in the Keychain under the wrong accessibility class.

Where it sits. The Android Application Security Posture Kit is the direct sibling — same backbone, same bands, Android's controls swapped in — and the pair is cheaper than buying both. The GitHub / GitLab Security Posture Kit covers the pipeline that builds the app; the Vibe-Coded App Security Posture Kit covers an AI-built backend behind it. The IR Runbook Library is the response layer; hand file 07 to the Director's Cyber Oversight Kit.

Written against OWASP MASVS v2.0, the OWASP Mobile Top 10 (2024), current iOS platform features and App Store policies as of Q3 2026, all marked verify. MASVS references are mappings, not conformance claims. Not a penetration test or a SAST engagement. Scores are a prioritisation aid, not a certification, an audit opinion or an insurance-underwriting determination. Not legal advice.