Full Report
Part 2: How the Red Agent bypassed backend resolvers to expose an entire airline booking database in fifteen minutes
Analysis Summary
# Vulnerability: Broken Object-Level Authorization in Airline GraphQL API
## CVE Details
- **CVE ID**: Not specified (This appears to be a zero-day discovery reported via private disclosure or a security research engagement).
- **CVSS Score**: Estimated 10.0 (Critical)
- **CWE**: [CWE-285: Improper Authorization](https://cwe.mitre.org/data/definitions/285.html), [CWE-639: Authorization Bypass Through User-Controlled Key](https://cwe.mitre.org/data/definitions/639.html)
## Affected Systems
- **Products**: Proprietary Airline Booking System / GraphQL API Gateway.
- **Versions**: Production environment as of June 2026.
- **Configurations**: Systems utilizing GraphQL backend resolvers that rely on sequential integer identifiers for record retrieval without server-side permission validation.
## Vulnerability Description
The vulnerability is a classic Broken Object-Level Authorization (BOLA) flaw within a GraphQL-based booking API. While the application enforced authentication at the front-end (assigning roles like "anonymous"), the backend resolvers failed to verify if the requesting user’s session had the authority to access or modify a specific object (e.g., a booking ID). Because the system used predictable, sequential integers for booking numbers, an attacker could iterate through IDs to access data belonging to any passenger.
## Exploitation
- **Status**: Verified by autonomous research agent; disclosed to the vendor.
- **Complexity**: Low (Predictable identifiers and lack of server-side checks).
- **Attack Vector**: Network (Remote API access).
## Impact
- **Confidentiality**: Total. Disclosure of two years of passenger data, including PII (names, DOB), billing addresses, and travel itineraries.
- **Integrity**: Total. Anonymous sessions were granted mutation permissions to modify contact details, hijack accounts, and change flight pricing.
- **Availability**: High. Ability to delete flight segments and cancel active trips.
## Remediation
### Patches
- The specific vendor has likely addressed the issue in their private codebase following the report. Organizations using similar GraphQL architectures should ensure resolvers implement authorization logic.
### Workarounds
- **Object-Level Checks**: Implement a "Least Privilege" model at the resolver level where every request validates the ownership of the requested object ID against the requester's session.
- **Non-Enumerable IDs**: Replace sequential integer IDs with Universally Unique Identifiers (UUIDs) or obscured slugs to prevent ID enumeration.
## Detection
- **Indicators of Compromise**:
- Large volumes of GraphQL `introspection` queries from unexpected sources.
- Unusual spikes in queries using sequential ID patterns from a single session.
- Unauthorized calls to sensitive mutations (e.g., `flightDelete`, `priceOverride`) from anonymous or low-privilege tokens.
- **Detection Methods**:
- Implement API monitoring to flag "Insecure Direct Object Reference" (IDOR) patterns.
- Audit GraphQL schemas to identify sensitive queries/mutations exposed to unauthenticated roles.
## References
- [Wiz Blog - Red Agent POV: Exploiting BOLA](https://www.wiz[.]io/blog/red-agent-pov-series)
- [OWASP API Security Top 10 - API1:2023 Broken Object Level Authorization](https://owasp[.]org/API-Security/editions/2023/en/0xa1-broken-object-level-authorization/)