Security rarely fails because of one critical mistake. It’s usually a series of small decisions: an exposed API, an outdated SDK, weak credential handling, data left unencrypted.
Alone, each looks minor. Together, they are exactly what 87% of organizations reported as a mobile security incident in the past year, despite steady investment in application security.
So, when product teams invest in a mobile app development company, they need to account for these risks across architecture, APIs, third-party integrations, data storage, and release processes.
This guide maps the OWASP Mobile Top 10 risks that help teams spot them early and apply the right security measures throughout development.
Why Mobile Apps Are Harder to Secure
Mobile applications now connect with APIs, cloud services, payment systems, analytics platforms, and third-party components. Each connection improves functionality, but it also introduces another area that requires protection.
Security gaps in any of these layers can create costly recovery efforts, which makes choosing the right mobile app tech stack an important architectural decision.
IBM’s 2026 Report found that the average data breach cost reached $4.44 million, highlighting why security decisions made during development can directly affect business outcomes.
A secure mobile application depends on several layers working together:
Overlooking any one of these layers can create opportunities for attackers.
OWASP Mobile Top 10: Security Risks Every App Must Address
The OWASP Mobile Top 10 outlines the security risks development teams should address when building and maintaining mobile applications.
These risks span credential handling, authentication, data protection, insecure communication, privacy, and application integrity.
Understanding them helps teams identify vulnerabilities early and apply the right security controls throughout the development lifecycle.
| OWASP Mobile Risk | Primary Impact | Addressed In |
| Improper Credential Usage | Exposed API keys, tokens, and credentials | Secure credentials and key management |
| Inadequate Supply Chain Security | Vulnerable SDKs and dependencies | Third-party SDK and dependency management |
| Insecure Authentication and Authorization | Unauthorized access to users or resources | Authentication and access control |
| Insufficient Input and Output Validation | Malicious requests and manipulated data | API security and input validation |
| Insecure Communication | Data interception during transmission | Secure network communication |
| Inadequate Privacy Controls | Unsafe handling of personal data | Data privacy and protection |
| Insufficient Binary Protections | Reverse engineering and code tampering | Binary protection and runtime security |
| Security Misconfiguration | Insecure application settings | Secure development and configuration |
| Insecure Data Storage | Sensitive information exposed on the device | Data storage and encryption |
| Insufficient Cryptography | Weak protection of sensitive data | Encryption and cryptographic key management |
Here is what each category looks like in practice, based on what shows up most often in real mobile app security assessments.
1. Improper Credential Usage
API keys, access tokens, and passwords should never be treated as ordinary application data. Once exposed through source code or reverse engineering, they can provide attackers with direct access to backend systems.
2. Inadequate Supply Chain Security
Modern mobile apps rarely rely on in-house code alone. Third-party SDKs and open-source libraries speed up development, but every dependency should be verified, monitored, and updated to reduce supply chain risk.
3. Insecure Authentication and Authorization
Authenticating a user is only the first step. Applications also need to enforce what every authenticated user is allowed to access, preventing unauthorized actions across APIs and business logic.
4. Insufficient Input and Output Validation
Every request and response should be treated as untrusted until validated. Proper validation prevents malicious data from affecting application behavior or exposing backend systems to unnecessary risk.
5. Insecure Communication
Every piece of data exchanged between a mobile app and its backend should travel through a secure connection. Without proper transport security, such as HTTPS and configured TLS, attackers can intercept sensitive information, including login credentials, payment details, and personal data.
6. Inadequate Privacy Controls
Users expect to know what information an app collects and why it needs it. Requesting unnecessary permissions or collecting more data than required increases both privacy risks and compliance concerns.
7. Insufficient Binary Protections
Once an app is installed, its code becomes a target. Without code obfuscation, integrity checks, and tamper detection, attackers can reverse engineer the application to uncover business logic, secrets, or security weaknesses.
8. Security Misconfiguration
Not every security issue comes from writing insecure code. Configuration oversights are among the common mobile app development mistakes that can create problems later. Debugging, excessive permissions, insecure cloud settings, and default configurations can even expose a well-built application.
9. Insecure Data Storage
Mobile apps often store user preferences, authentication tokens, and other sensitive information on the device. Keeping that data in unprotected storage makes it easier to access if the device or application is compromised.
10. Insufficient Cryptography
Encryption is only as strong as its implementation. Outdated algorithms, weak key management, or improperly generated encryption keys can leave sensitive data exposed even when encryption is technically in place.
Understanding where these risks originate makes it easier to choose the right security controls later in the development process.
Implement Mobile Security Best Practices Across the Development Lifecycle
Every stage of the development lifecycle introduces different risks, so security controls should evolve with the product instead of being treated as a final release task.
Let’s get to know the best practices for it!
1. Write Secure, Reviewable Code from the Start
Every feature, bug fix, or integration introduces new code, and with it, new security and mobile app performance considerations. Following secure coding standards and running automated analysis throughout development helps catch vulnerabilities before they become part of the release.
Focus areas
- Follow secure coding guidelines.
- Review security-critical code before every release.
- Run SAST tools during development.
- Include threat modeling for sensitive features.
Example: If a developer accidentally leaves an API key in the source code, a code review or automated security scan can detect it before the application is released.
2. Protect the Build Against Reverse Engineering and Tampering
Once an app is published, anyone can download it. Code obfuscation, binary hardening, app signing, and integrity verification make it significantly harder for attackers to understand the application’s logic or modify its behavior.
These protections don’t replace secure coding, but they increase the effort required to reverse engineer the application.
Focus areas
- Enable code obfuscation.
- Verify application integrity.
- Sign every production build.
- Disable debugging in release versions.
Example: Two shopping apps offer the same features. One uses code obfuscation, while the other doesn’t. The unobfuscated app is much easier to inspect, copy, or modify after it’s downloaded.
3. Secure Sensitive Data and Cryptographic Keys
Sensitive information deserves the same level of protection whether it’s stored on the device or transmitted to backend services. Encryption alone isn’t enough if encryption keys are exposed or stored alongside the protected data.
Use platform security features such as Android Keystore (Android Developers) and Apple Keychain Services (Apple Developer) to store cryptographic keys securely instead of embedding them in the application.
Focus areas
- Encrypt sensitive data at rest.
- Store keys in Android Keystore or iOS Keychain.
- Never hardcode secrets.
- Rotate keys when necessary.
Example: A banking app stores a user’s authentication token in Android Keystore instead of local storage, making it far more difficult to extract even if the device is compromised.
4. Secure Network Communication and API Access
Every request between the mobile app and backend services should be authenticated, validated, and encrypted. Using HTTPS with TLS, certificate pinning where appropriate, strong API authentication, and input validation reduces the risk of interception and unauthorized access.
Protecting the API is just as important as protecting the application itself because many attacks target backend endpoints rather than the mobile interface.
Focus areas
- Enforce HTTPS and TLS.
- Validate all API requests.
- Implement certificate pinning where appropriate.
- Apply rate limiting to sensitive endpoints.
Example: When a user logs in over public Wi-Fi, HTTPS and TLS encrypt the connection so usernames, passwords, and session tokens cannot be read during transmission.
Case in Practice: Inceptives Digital implemented secure API communication in DPS Airem to protect real-time incident reports, workforce data, and GPS updates as they moved between the mobile app and cloud services.
5. Strengthen Authentication, Sessions, and Access Control
Authentication doesn’t end after login. User sessions should be validated throughout the application’s lifecycle to reduce the risk of stolen or expired tokens being reused.
Modern applications also benefit from multi-factor authentication, biometric authentication, and standards such as OAuth 2.0 or OpenID Connect.
Focus areas
- Support multi-factor authentication.
- Use biometric authentication where appropriate.
- Expire inactive sessions.
- Validate access tokens continuously.
Example: A user signs in on their phone but later tries to access the same account from an unfamiliar device. The application requests another verification step before allowing access.
6. Detect and Respond to Runtime Threats
Some attacks occur only after the application reaches a user’s device. Root detection, jailbreak detection, emulator detection, Runtime Application Self-Protection (RASP), and runtime integrity checks help identify suspicious environments before sensitive operations are performed.
Runtime protection complements secure development by defending against threats that cannot be identified during testing.
Focus areas
- Detect rooted and jailbroken devices.
- Identify emulator-based attacks.
- Implement runtime integrity checks.
- Monitor for application tampering.
Example: Before processing a payment, the application checks whether the device has been rooted. If the environment appears compromised, the transaction is blocked until the risk is resolved.
7. Reduce Risk from Third-Party Components
External SDKs and open-source libraries speed up development, but they also become part of the application’s attack surface. Teams building custom mobile applications should establish a regular dependency review process to keep third-party components secure and up to date.
Regular dependency scanning helps identify outdated components before they become security risks.
Focus areas
- Review SDK permissions.
- Scan dependencies regularly.
- Remove unused libraries.
- Keep third-party components updated.
Example: An application uses an analytics SDK that later receives a security patch. Updating the SDK promptly closes the vulnerability before it can be exploited.
8. Protect Mobile Applications Against Automated Attacks
Not every attack comes from a human user. Automated bots can abuse APIs, attempt credential stuffing, scrape data, or generate fraudulent transactions at scale.
Combining device attestation, rate limiting, bot detection, and fraud monitoring helps reduce automated abuse without affecting legitimate users.
Focus areas
- Detect bot traffic.
- Rate limit sensitive APIs.
- Verify trusted devices.
- Monitor unusual request patterns.
Example: An online ticketing app notices thousands of login attempts from the same source within a few minutes. Rate limiting blocks the automated requests while genuine users continue using the app.
9. Continuously Verify Security Through Testing and Monitoring
Security isn’t complete when the application launches. Regular penetration testing, dynamic testing, continuous monitoring, and verification against the OWASP MASVS help ensure new releases don’t introduce avoidable vulnerabilities.
A structured mobile app testing strategy also helps identify security, performance, and reliability issues before they affect users.
Focus areas
- Perform SAST and DAST regularly.
- Schedule penetration testing.
- Validate against OWASP MASVS.
- Monitor production environments continuously.
Example: After a major feature update, a penetration test uncovers an API that exposes more user data than intended. Fixing the issue before release prevents it from reaching production.
Platform-Specific Security Considerations for Android and iOS
Android and iOS follow different security models, so the same protection doesn’t always work the same way on both platforms. Understanding those differences helps development teams apply platform-specific controls instead of relying on a one-size-fits-all approach.
| Security Area | Android | iOS |
| Application Sandbox | Flexible architecture with greater customization | Strict sandbox enforced by the operating system |
| App Distribution | Supports sideloading and multiple app stores | Primarily distributed through the App Store |
| Secure Storage | Android Keystore | iOS Keychain |
| Network Security | TLS must be configured by the developer | App Transport Security enabled by default |
| Device Integrity | Higher exposure to rooted devices and custom ROMs | Lower exposure, but jailbroken devices remain a risk |
| OS Fragmentation | Wide range of devices and OS versions | Faster adoption of the latest iOS versions |
| Reverse Engineering | APKs are generally easier to inspect | IPAs provide stronger default protection |
The differences above don’t make one platform universally more secure than the other.
- Android offers greater flexibility, but that flexibility places more responsibility on development teams building Android applications to configure security correctly.
- iOS starts with stronger built-in protections, although applications built for iOS still depend on secure design and implementation.
The same principle applies to React Native, Flutter, and other cross-platform frameworks. Their security depends on the quality of the native integrations, APIs, and third-party libraries they rely on, not on the framework itself.
Wrap Up
Building a secure mobile application is all about applying the right controls throughout the development lifecycle.
The OWASP Mobile Top 10 helps identify where the biggest risks exist, while OWASP MASVS provides a practical way to verify that those risks have been addressed before release. Together, they give development teams a structured approach to building and maintaining secure mobile applications.
As applications evolve, so do the threats targeting them. Reviewing security regularly, testing new releases, and keeping dependencies up to date help reduce risk long after the first version reaches users.
Frequently Asked Questions
The OWASP Mobile Top 10 identifies the most critical mobile application security risks. The best practices in this guide help reduce those risks throughout development, testing, deployment, and ongoing maintenance.
A mobile app security audit typically costs $5,000 to $30,000+ and takes one to four weeks, depending on the application’s size, complexity, supported platforms, and testing scope.
Yes. Certificate pinning provides an additional layer of protection by verifying the server’s identity, helping reduce the risk of man-in-the-middle attacks even when TLS is used correctly.
Perform mobile app penetration testing before every major release and at least annually. Applications processing financial or healthcare data often require more frequent security assessments to meet compliance requirements.
Modern code obfuscation tools such as R8 have little to no noticeable performance impact. They primarily make application code more difficult to reverse engineer without affecting the user experience.
No. React Native and Flutter can achieve the same level of security as native apps when APIs, native modules, third-party libraries, and platform security features are implemented correctly.
The OWASP Mobile Top 10 identifies common security risks, while OWASP MASVS defines security requirements and verification criteria used to assess whether a mobile application meets those expectations.
GDPR, HIPAA, and CCPA require organizations to protect sensitive data through secure storage, encryption, access controls, privacy safeguards, and ongoing security practices appropriate to the application’s purpose.
