EresusSecurity

Areas Served

Eresus Security delivers advanced offensive security services globally and across specific industry verticals. Select your relevant area below to explore our scoped expertise.

Security Solutions by Region

London

Europe, United Kingdom

Dubai

Middle East, United Arab Emirates

New York

North America, United States

Singapore

Asia-Pacific, Singapore

Riyadh

Middle East, Saudi Arabia

Berlin

Europe, Germany

Amsterdam

Europe, Netherlands

Tokyo

Asia-Pacific, Japan

Toronto

North America, Canada

Sydney

Asia-Pacific, Australia

San Francisco

California, USA

Austin

Texas, USA

Industry-Specific Penetration Testing

Financial Services

Banks, fintechs, and financial institutions handle the most sensitive data in the digital economy. A single compromised API endpoint can expose millions of customer records and trigger regulatory penalties exceeding $100M.

Healthcare

Healthcare organizations manage life-critical systems and protected health information. Ransomware attacks on hospitals directly endanger patient lives, making security testing a matter of public safety.

E-Commerce

E-commerce platforms process millions of payment transactions daily. A single checkout flow vulnerability can expose card data at scale, trigger PCI non-compliance fines, and permanently damage consumer trust.

SaaS & Technology

SaaS platforms serve as critical infrastructure for thousands of businesses. A single tenant isolation failure can cascade into a multi-organization data breach affecting millions of end users.

Crypto & Blockchain

Crypto exchanges and DeFi protocols control billions of dollars in digital assets. Smart contract vulnerabilities are irreversible once exploited, making pre-deployment security audits existentially critical.

Government & Defense

Government systems underpin national security, public services, and democratic processes. Nation-state adversaries invest billions in offensive cyber capabilities targeting government infrastructure.

Energy & Utilities

Energy and utility companies operate the physical infrastructure that powers modern civilization. A successful cyber attack on energy systems can cause blackouts affecting millions and endanger public safety.

Telecommunications

Telecom operators manage the backbone of digital connectivity. Compromised telecom infrastructure enables mass surveillance, call interception, and disruption of emergency services.

Security Testing by Technical Branch

Node.js Backend

Security-informed backend delivery for Node.js services, workers, auth layers, and high-traffic APIs.

Express/NestJS service boundariesQueue and worker safety

Python Backend

Maintainable backend delivery for Python APIs, internal services, AI integrations, and operational workflows.

FastAPI/Django service designBackground jobs and schedulers

Go Backend

High-performance backend engineering for Go services with explicit operational boundaries and resilient delivery patterns.

Goroutines and queue patternsgRPC and REST services

Kubernetes

Delivery and hardening support for Kubernetes clusters, workload boundaries, secrets handling, and release safety.

Cluster access modelSecret and workload hygiene

CI/CD

DevSecOps work centered on pipeline design, secret hygiene, build agents, and release-gate discipline.

Pipeline secret handlingBuild-agent and artifact security

Static Source Code Analysis

Source-code security review that traces repository-level defects through data flow, framework usage, authorization decisions, and secure coding patterns.

Injection and unsafe sink checksAuthorization decisions in code

Data Flow and Taint Analysis

Deep code analysis that follows user-controlled input from sources into databases, file systems, command execution, templates, and external service calls.

Input sources and trust boundariesSQL, command, template, and file sinks

Auth and Authorization Code Review

Application security review for sessions, roles, permissions, tenant boundaries, and object-level access decisions inside the codebase.

Centralized role and permission checksObject-level authorization

Framework Secure Code Review

Security review for unsafe framework usage in Django, FastAPI, Laravel, Spring, Next.js, NestJS, and similar application stacks.

Preserving framework security defaultsMiddleware and guard ordering

Next.js Secure Code Review

Source-code security review for Next.js applications across Server Actions, API routes, middleware, SSR data access, and secrets leaking into client bundles.

Server Actions and API route authorizationSSR/ISR data exposure and cache behavior

NestJS Secure Code Review

Source-code analysis for NestJS services across guards, interceptors, pipes, DTO validation, module boundaries, and service-to-service trust decisions.

Guard and decorator authorization modelDTO validation and class-transformer risk

Django Secure Code Review

Security review for Django applications across views, models, serializers, permissions, ORM usage, and settings risk with file and function-level proof.

View and permission controlsORM queries and unsafe raw SQL usage

FastAPI Secure Code Review

Source-code analysis for FastAPI services across dependency injection, Pydantic validation, async workflows, auth dependencies, and API data boundaries.

Dependency-based auth and authorization decisionsPydantic model validation gaps

Spring Boot Secure Code Review

Secure code review for Spring Boot applications across controllers, services, repositories, Spring Security, bean configuration, and data access risk.

Spring Security filter chain and method-level authorizationRepository and query safety

Laravel Secure Code Review

Secure code review for Laravel applications across controllers, middleware, policies, validation, Eloquent usage, and upload workflows.

Policy, gate, and middleware authorization controlsRequest validation and mass assignment risk

IDOR and BOLA Code Review

Source-code analysis that verifies whether object-level authorization is actually enforced across routes, controllers, services, and data access layers.

Object ownership and tenant separationUser-controlled IDs reaching data access

SQL Injection Code Analysis

Data-flow review for user input reaching ORM, query builder, raw SQL, and reporting queries without safe handling.

Raw SQL and dynamic query constructionORM escape hatches and unsafe expressions

SSRF Code Review

Source-code review for user-controlled outbound request risk in webhooks, URL imports, file fetchers, avatar proxies, and integration callbacks.

User-controlled URL and fetch pointsAllowlist, DNS pinning, and redirect controls

Command Execution Code Review

Source-code analysis for command injection risk in file processing, model conversion, archive handling, external tool invocation, and script execution workflows.

shell, subprocess, and exec callsUser input reaching command arguments

File Upload Code Review

Code review for upload, import, conversion, archive extraction, and media-processing workflows across file type, path traversal, malware, and pipeline risk.

File type and content validationPath traversal and archive extraction risk

JWT and OAuth Code Review

Security review for JWT validation, OAuth callbacks, token refresh, scope checks, and identity propagation across services.

Token signature, audience, issuer, and algorithm validationOAuth redirect URI and callback safety

AI Application Source Code Analysis

Source-code review for applications that integrate LLMs, RAG, agents, tool calls, and model providers through an AI security lens.

Prompt, system message, and tool-call code pathsModel provider keys and logging behavior

RAG Application Code Review

Code review for RAG applications across document ingestion, indexing, chunking, authorization filters, source attribution, and prompt assembly paths.

Retrieval authorization filters and tenant separationChunking, metadata, and source trust

MCP and Agent Code Review

AI security review for MCP servers, agent runtimes, tool manifests, permission models, and production action boundaries across code and configuration.

MCP tool manifest and schema validationAgent identity and tool permission scope

LLM Tool Permission Review

Security review for LLM tool permissions, tool schemas, argument validation, file/network access, and production action abuse risk.

Tool schema and argument validationFile, network, database, and payment action permissions

Prompt Injection Code Path Review

Code-path review for how user input, documents, email, web content, and tool output enter the LLM prompt context.

Untrusted input entering promptsSystem and developer message boundaries

Runtime Web Application Testing

Testing for deployed web applications in production-like environments across sessions, forms, redirects, uploads, and browser security boundaries.

Authentication and session flowsForms, uploads, and redirect controls

API Runtime Security Testing

Runtime testing for REST, GraphQL, and internal APIs across authorization, data leakage, rate limiting, and failure handling.

Endpoint discovery and off-contract behaviorAuthorization bypass and object-level access

Identity and Session Runtime Testing

Runtime validation for login, MFA, password reset, token refresh, and session revocation flows.

MFA and account recovery flowsToken lifetime, refresh, and revocation behavior

Business Logic Testing

Manual testing for checkout, payment, limits, approvals, refunds, coupons, role changes, and approval chains that automated scanners usually miss.

Unauthorized transaction orderingLimit and approval bypass scenarios

Dependency and Package Review

Release-oriented review for open-source packages, transitive dependencies, known vulnerabilities, abandoned libraries, and package integrity risks.

Direct and transitive dependenciesKnown vulnerabilities and exploit maturity

SBOM and License Risk

Application security work that turns a software bill of materials into usable security, license, and supply-chain evidence.

SBOM coverage and accuracyLicense mismatch and commercial risk

CI/CD Secret Scanning

Detection and response workflow for exposed secrets in pipelines, environment variables, build logs, artifacts, and integration tokens.

Pipeline secret usageBuild-log and artifact leaks

Git History Secret Scanning

Repository scanning that goes beyond the latest commit to inspect old commits, branches, tags, and deleted files for exposed credentials.

Commit history and old branchesSecrets left in deleted files

IaC Security Review

Security review for Terraform, Helm, Kubernetes manifests, and cloud configuration across excessive permissions, open networks, missing encryption, and drift.

Network exposure and default accessIAM, role, and service-account permissions

Container Image Security

Security review for container images across base images, package vulnerabilities, secret residue, user privileges, and image integrity.

Base image and package vulnerabilitiesRoot users and unnecessary tools

Release Gate Policy

CI/CD security policy that connects code, dependency, secret, container, and runtime findings to one clear release decision model.

Blocking versus tracked risksCritical finding exception process

Manual Exploit Validation

Controlled validation that proves whether a scanner finding can actually be exploited before it becomes a report item.

Automated finding triageSafe PoC development

MCP-Enabled Apps

Controlled AI security validation for agentic applications with MCP servers, tool actions, and identity boundaries.

MCP registration and identity boundariesTool abuse and over-permissioned execution

Compliance & Regulation-Driven Audits

GDPR Control Mapping

SOC 2 Evidence Readiness

ISO 27001 Control Readiness

PCI-DSS Technical Validation