CVE-2026-84148 Overview
CVE-2026-84148 is an Insecure Direct Object Reference (IDOR) vulnerability [CWE-639] affecting an Enterprise Resource Planning (ERP) system. The flaw stems from improper authentication and authorization controls in an API endpoint. An unauthenticated remote attacker can manipulate request parameters to access sensitive information belonging to other users on the targeted system. The vulnerability was documented in CERT-IN Advisory CIVN-2026-0430.
Critical Impact
An unauthenticated attacker can exfiltrate confidential user data across tenant or account boundaries by tampering with API parameters, with no privileges or user interaction required.
Affected Products
- ERP system referenced in CERT-IN Advisory CIVN-2026-0430
- Specific vendor and product identifiers are not published in the NVD record
- Consult the CERT-IN advisory for the authoritative list of affected versions
Discovery Timeline
- 2026-09-01 - CVE-2026-84148 published to the National Vulnerability Database (NVD)
- 2026-09-01 - Last updated in the NVD database
- 2026-09-03 - Exploit Prediction Scoring System (EPSS) data recorded
Technical Details for CVE-2026-84148
Vulnerability Analysis
The vulnerability is an Insecure Direct Object Reference in an ERP API endpoint. The endpoint accepts a user-supplied identifier, such as a numeric user ID or record identifier, and returns the associated resource without verifying that the requester is authorized to view it. Because authentication is also missing on the endpoint, no valid session or API token is required to reach the vulnerable code path.
An attacker enumerates identifiers by incrementing or fuzzing the parameter value. Each request returns records belonging to other users, enabling large-scale data harvesting. The impact is confined to confidentiality; integrity and availability of the ERP system are not directly affected based on the published metrics.
Root Cause
The root cause is a broken access control pattern [CWE-639]. The API endpoint trusts the object identifier supplied in the request instead of resolving the object from the authenticated principal's context. Two controls fail simultaneously: authentication is not enforced at the endpoint, and object-level authorization is not evaluated before returning data.
Attack Vector
Exploitation occurs over the network against the exposed ERP API. An attacker crafts HTTP requests to the vulnerable endpoint and modifies the object reference parameter, for example a userId, accountId, or recordId value. The server returns sensitive information tied to the referenced object. No credentials, elevated privileges, or user interaction are needed.
No verified proof-of-concept code is published in the referenced advisory. Refer to the CERT-IN Advisory CIVN-2026-0430 for vendor-specific technical details.
Detection Methods for CVE-2026-84148
Indicators of Compromise
- High-volume sequential or fuzzed values in identifier parameters such as id, userId, customerId, or recordId on ERP API endpoints.
- Unauthenticated HTTP requests to API paths that return user or account records with HTTP 200 responses.
- Spikes in outbound response sizes from ERP API hosts to a small set of external IP addresses.
- Access patterns from a single source IP touching records associated with many distinct user or tenant identifiers.
Detection Strategies
- Deploy Web Application Firewall (WAF) rules that flag rapid iteration over numeric identifier parameters on ERP API routes.
- Instrument API gateways to log the authenticated principal alongside the object identifier requested, and alert on mismatches or null principals.
- Correlate authentication logs and API access logs to identify successful data retrieval requests that lack a preceding authentication event.
Monitoring Recommendations
- Monitor API access logs for unauthenticated 200 OK responses on endpoints that return personally identifiable information.
- Baseline request rates per source IP against ERP API endpoints and alert on deviations exceeding two standard deviations.
- Track enumeration signatures such as monotonically increasing identifier values within short time windows.
How to Mitigate CVE-2026-84148
Immediate Actions Required
- Identify all ERP API endpoints that accept object identifiers and confirm each enforces authentication before processing the request.
- Restrict network exposure of the ERP API to trusted networks or place it behind an authenticated reverse proxy until a vendor patch is applied.
- Review API access logs for the preceding 90 days to identify potential unauthorized data access.
- Apply the vendor patch referenced in CERT-IN Advisory CIVN-2026-0430 as soon as it is available.
Patch Information
The NVD entry does not list a specific vendor patch URL. Consult the CERT-IN Advisory CIVN-2026-0430 for vendor remediation guidance and fixed version details. Apply updates according to the vendor's release notes.
Workarounds
- Enforce authentication on all ERP API endpoints at the API gateway or reverse proxy layer.
- Implement server-side object-level authorization checks that resolve records from the authenticated user's context rather than trusting client-supplied identifiers.
- Rate-limit requests to identifier-based endpoints to slow enumeration attempts.
- Replace sequential numeric identifiers with unpredictable values such as UUIDv4 to reduce enumeration feasibility, while keeping authorization checks in place.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
