API Security Testing
— JWT and OAuth Code Review
Offensive security testing customized for JWT and OAuth Code Review risk profiles. Uncover critical vulnerabilities with our dedicated API Security Testing experts.
Free Scoping CallJWT and OAuth Code Review delivery and security model
Security review for JWT validation, OAuth callbacks, token refresh, scope checks, and identity propagation across services.
Focus areas
- Token signature, audience, issuer, and algorithm validation
- OAuth redirect URI and callback safety
- Refresh token storage and revocation behavior
- Scope and service-to-service authorization propagation
Delivery notes
- Findings are tied to token lifecycle and code location
- Authorization impact is explained through real roles and scopes
- Remediation is split between identity provider and application layers
Decision matrix
JWT and OAuth Code Review is not just a service label; it states how each control is validated and which evidence is expected at closure.
| Control | Decision question | Validation | Expected evidence |
|---|---|---|---|
| Token signature, audience, issuer, and algorithm validation | Does Token signature, audience, issuer, and algorithm validation create real risk? | Validated against the relevant code, request, configuration, or runtime behavior in API Security Testing. | Findings are tied to token lifecycle and code location |
| OAuth redirect URI and callback safety | Does OAuth redirect URI and callback safety create real risk? | Validated against the relevant code, request, configuration, or runtime behavior in API Security Testing. | Authorization impact is explained through real roles and scopes |
| Refresh token storage and revocation behavior | Does Refresh token storage and revocation behavior create real risk? | Validated against the relevant code, request, configuration, or runtime behavior in API Security Testing. | Remediation is split between identity provider and application layers |
| Scope and service-to-service authorization propagation | Does Scope and service-to-service authorization propagation create real risk? | Validated against the relevant code, request, configuration, or runtime behavior in API Security Testing. | Findings are tied to token lifecycle and code location |
What if Token signature, audience, issuer, and algorithm validation fails?
Eresus maps this area to real user-flow or delivery-pipeline impact, so the finding is not left as a generic technical label.
What if OAuth redirect URI and callback safety fails?
Eresus maps this area to real user-flow or delivery-pipeline impact, so the finding is not left as a generic technical label.
What if Refresh token storage and revocation behavior fails?
Eresus maps this area to real user-flow or delivery-pipeline impact, so the finding is not left as a generic technical label.
Proof-Driven Methodology
Asset Recon
Attack surface mapping & asset enumeration
Risk Modeling
Penetration testing beyond automated scanners
Exploit Chaining
PoC validation for every finding
Quality & Reporting
Remediation code + free retest
Frequently Asked Questions
What decision does JWT and OAuth Code Review clarify?
JWT and OAuth Code Review clarifies exploitability, affected workflows, and release impact for API Security Testing with evidence rather than scanner noise.
What evidence is included in JWT and OAuth Code Review?
Findings are tied to token lifecycle and code location Also, Authorization impact is explained through real roles and scopes. Retest criteria and ownership notes are included for closure.
How is this different from an automated scanner report?
Automated findings are not forwarded as-is; false positives are removed, abuse paths are proven, and remediation priority is explained.
Why Eresus Security?
Proof-Driven Reporting
Every finding is validated with a real exploit. No scanner noise — only proven risks.
Offensive Security Expertise
Specialized team in AI security, API pentesting, Red Team operations, and cloud security review.
Retest Support
Fixes are revalidated within the agreed engagement scope. Remediation guidance and developer-friendly notes are included.
Evidence-Ready Deliverables
Report format designed to support internal review, remediation tracking, and evidence-oriented workflows.
Related Service Areas
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