Our Code Review services help you identify and remediate security vulnerabilities within your application source code, ensuring a more secure and resilient software product.
ReactiveZero's Secure Code Review services focus on identifying security flaws and vulnerabilities directly within your application's source code. Our experts analyze your codebase for common weaknesses, insecure coding practices, and potential backdoors, helping you build more secure and robust software from the ground up.
We run each review like a pull request against your codebase: scoped, triaged, read line by line, proven, then handed back as mergeable fixes.
We map entry points, trust boundaries and the assets that matter, then agree which repositories, branches and commits are in scope.
OutputScoping note & threat modelSAST, dependency and secret scanners run over the full tree; we de-duplicate the output and discard false positives before anyone reads code.
OutputTriaged scanner findingsReviewers trace each input from entry point to sink and read the business logic, race conditions and framework misuse no scanner understands.
OutputAnnotated findings with file & lineEach candidate issue is reproduced against a running build; exploitable findings are rated by impact and reachability, not by tool score.
OutputProof-of-concept per findingYou receive a developer-ready report with fixed-code diffs, a walkthrough with your team, and a re-review of the patches once merged.
OutputReport, patch diffs & re-reviewWe trace untrusted input from every entry point to every sink to find the injection flaws automated tools miss: SQL and NoSQL injection, command injection, server-side template injection and both reflected and stored cross-site scripting (XSS). Our reviewers confirm that input is validated on the server, that output is encoded for the correct context, and that parameterised queries and safe APIs are used consistently. Each finding comes with a proof-of-concept, the affected source line and a concrete, framework-specific fix aligned to the OWASP ASVS.
We review how your application proves who a user is and what they are allowed to do. That means examining session management, password and token handling, multi-factor flows, and OAuth or SSO integrations, plus every authorization check that guards a sensitive action or record. We look specifically for broken access control and IDOR issues, privilege escalation and missing server-side checks behind hidden UI. Findings map to the OWASP ASVS chapters on authentication and access control, with clear remediation your developers can apply without redesigning the whole system.
We assess whether sensitive data is genuinely protected at rest and in transit, not just labelled as such. Our reviewers check algorithm and key-length choices, key generation, storage and rotation, TLS configuration, password hashing, and the handling of secrets in source, config and CI/CD pipelines. We flag home-grown cryptography, hard-coded keys and weak randomness, and confirm that personal data is stored in line with GDPR expectations. Every issue is reported with its impact, the exact location and a practical, standards-aligned fix mapped to the OWASP ASVS.
Poor error handling leaks stack traces and internal details to attackers, while poor logging leaves you blind during an incident. We review how your application catches and reports errors, whether it exposes sensitive information in messages or responses, and whether security-relevant events such as logins, privilege changes and data access are logged without capturing secrets or personal data. We check that logs are tamper-resistant and useful for your SOC or incident-response partner. Findings are mapped to the OWASP ASVS logging requirements and delivered with prioritised remediation.
Ready to strengthen your security posture? Let's discuss how we can help protect your organization.