GraphQL's flexibility is also its attack surface. A single endpoint exposes your entire schema, and per-resolver authorization gaps are easy to introduce and hard to spot. Our GraphQL security testing targets exactly these weaknesses.
We map the schema through introspection or field suggestion, then attack authorization at the resolver level, abuse aliases and batching for rate-limit and DoS bypass, and probe for injection reachable through queries and mutations.
Our GraphQL security testing targets the risks unique to GraphQL APIs: schema disclosure via introspection or field suggestion, per-resolver authorization gaps (the GraphQL form of IDOR), denial of service through deep or complex queries, and rate-limit bypass via aliases and batching. We test queries, mutations and subscriptions, and we assess how your GraphQL layer authorizes access to each object and field — the place where most serious, exploitable GraphQL bugs are found.
GraphQL exposes your entire schema through a single flexible endpoint, and per-resolver authorization gaps are easy to introduce and hard to spot — making authorization and denial-of-service the dominant real-world risks. Generic scanners rarely understand GraphQL well enough to find them.
Dedicated GraphQL security testing targets exactly these weaknesses: resolver-level access control, query-depth and batching abuse, and injection reachable through queries and mutations.
What we test
Introspection & schema disclosure
Per-resolver authorization (IDOR) gaps
Alias/batching rate-limit bypass
Query-depth & complexity denial of service
Injection via arguments and variables
Mutation and business-logic abuse
Common vulnerabilities we uncover
Per-resolver authorization (IDOR) gaps
Introspection and schema disclosure
Alias and batching rate-limit bypass
Query-depth and complexity denial of service
Injection via arguments and variables
Business-logic abuse through mutations
Our methodology
Scoping & rules of engagement. We agree objectives, targets and boundaries for your graphql security testing, so testing is safe, authorized and focused on what matters to your business.
Reconnaissance & mapping. We enumerate the full attack surface in scope, building a complete picture before any exploitation begins.
Manual exploitation. Our senior testers chain vulnerabilities by hand — going far beyond automated scanners — to prove real, demonstrable impact.
Analysis & reporting. Every finding is triaged, risk-rated with CVSS and written up with a copy-paste reproduction and clear remediation.
Remediation support & free retest. We support your team through the fixes and retest the remediated issues to confirm they are genuinely closed.
Tools & techniques
We test GraphQL manually with Burp Suite, GraphQL-specific tooling and custom queries. We map the schema through introspection or field suggestion, build a resolver-level authorization matrix, and attack access control, query depth and complexity, alias and batch abuse, and injection through arguments and variables. Testing covers queries, mutations and subscriptions across Apollo, Hasura, AWS AppSync and custom servers.
When you need this engagement
For any application exposing a GraphQL API to clients or partners
When per-object or per-field authorization is complex
To prevent query-depth and batching denial-of-service
As part of a broader API security assessment
What you receive
Schema & resolver authorization map
Findings with GraphQL query PoCs
Severity ratings and hardening guidance
Free retest after remediation
What’s included in your report
Every graphql security testing engagement concludes with a comprehensive, board-ready report and a working session to walk your team through it. Your report includes:
An executive summary with overall risk posture for non-technical stakeholders
Detailed technical findings, each with a step-by-step, copy-paste reproduction
CVSS v3.1 severity ratings and business-impact context for every issue
Prioritized, actionable remediation guidance your engineers can apply directly
A complimentary retest to confirm fixes and update finding status
A formal attestation letter for customers, auditors and compliance programs
Standards & frameworks
OWASP API Security Top 10OWASP WSTGGraphQL security best practices
Outcomes you can expect
After your graphql security testing, you will have clear, evidence-based visibility into your real security risk — not a scanner’s guesswork. You will know exactly which weaknesses an attacker could exploit, what the business impact would be, and the precise steps to fix them in priority order. Teams use our findings to close critical gaps, satisfy customer and regulator security requirements, and demonstrate due diligence to their board. With a complimentary retest included, you also get documented proof that the issues are genuinely resolved.
Engagement details & logistics
Every graphql security testing starts with a short, no-obligation scoping call to understand your goals, environment and constraints, followed by a fixed-price proposal and a clear statement of work. Most engagements are delivered fully remotely, with on-site work arranged where it genuinely adds value. Throughout testing we maintain an agreed communication cadence and escalate any critical, high-impact finding to you immediately rather than waiting for the final report. All work is performed under a signed NDA with strict data-handling controls, using safe, non-disruptive techniques and carefully coordinated rules of engagement to protect your production systems. On completion you receive your report and a walkthrough session, followed by a complimentary retest once your fixes are in place. Typical engagements are booked one to three weeks in advance, and urgent or pre-deadline testing can often be accommodated — just ask at hi@agentoffense.com.
Why organizations choose AgentOffense
Our graphql security testing is delivered by senior offensive-security engineers who test the way real attackers do — manually, creatively and with a relentless focus on proving genuine, demonstrable impact. Here is what sets our engagements apart:
Manual, exploit-driven testing that chains vulnerabilities the way a real attacker would, going far beyond what automated scanners can find.
Reproducible proof for every finding, with copy-paste reproduction steps your engineers can follow and independently verify.
Honest severity calibration so you invest in fixing what genuinely matters and avoid wasting effort on false positives and noise.
Clear, business-focused reporting that speaks to engineers and executives alike, tying every issue to real-world impact.
A complimentary retest included, so you get documented proof that your fixes actually close the attack path.
Responsible, collaborative delivery with a named point of contact and secure handling of all data throughout the engagement.
Explore related services
GraphQL Security Testing is frequently scoped alongside our other offensive-security services for broader coverage. Explore related engagements that complement it:
API Penetration Testing — REST and GraphQL API penetration testing against the OWASP API Top 10 — BOLA, BFLA, mass…
Web Application Penetration Testing — Manual web application penetration testing against the OWASP Top 10 and business-logic flaws. Exploit-driven testing with…
LLM Application Penetration Testing — LLM application penetration testing — the full stack around your model: prompts, plugins, APIs, output handling…
How much does GraphQL Security Testing cost?
Every graphql security testing is scoped and priced individually, so you pay for exactly the coverage you need — with no hidden extras. After a short, no-obligation scoping call we send a fixed-price quote, usually within one business day, with clear deliverables, a firm timeline and a complimentary retest included. The price of your graphql security testing depends on the size and complexity of the target and the depth of testing required, so you always know the cost up front before any work begins.
