CVE-2026-51893: infiniflow ragflow Auth Bypass Vulnerability

CVE-2026-51893 Overview

CVE-2026-51893 is an Incorrect Access Control vulnerability in infiniflow ragflow version 0.24.0. The flaw resides in the trace_mindmap functionality, where an externally reachable endpoint accepts a caller-selected object or tenant identifier. The endpoint reaches a data-access operation without validating owner, tenant, workspace, or membership binding on the referenced object. Unauthenticated attackers over the network can access data belonging to other tenants. The weakness is classified under [CWE-284: Improper Access Control].

Critical Impact

Remote, unauthenticated attackers can read, modify, or disrupt tenant-scoped data by supplying arbitrary identifiers to the trace_mindmap endpoint.

Affected Products

• infiniflow ragflow 0.24.0

Discovery Timeline

• 2026-10-01 - CVE-2026-51893 published to the National Vulnerability Database (NVD)
• 2026-10-05 - CVE-2026-51893 last modified in NVD

Technical Details for CVE-2026-51893

Vulnerability Analysis

The trace_mindmap endpoint in ragflow 0.24.0 exposes a data-access operation to any network caller. The handler trusts caller-supplied identifiers to locate the target object or tenant record. No visible authorization check binds the requested resource to the caller's tenant, workspace, or group membership. As a result, an attacker can enumerate or substitute identifiers to reach data owned by other tenants. The impact extends to confidentiality, integrity, and availability because the data-access path reached is not read-only in all branches.

Root Cause

The root cause is the absence of an authorization binding between the authenticated principal (or lack thereof) and the object being accessed. The implementation delegates object retrieval to the identifier passed in the request, treating that identifier as both the lookup key and the implicit permission grant. This pattern matches [CWE-284] Improper Access Control, often referred to as a missing tenant-scope check or Broken Object-Level Authorization (BOLA).

Attack Vector

Exploitation requires only network access to the ragflow HTTP interface. An attacker crafts a request to the trace_mindmap route and substitutes an object or tenant identifier they do not own. The server returns or operates on the targeted record without rejecting the request. No user interaction, elevated privileges, or complex preconditions are required. A proof-of-concept gist is referenced in the external advisory material. For reproduction details, see the GitHub PoC Repository.

Detection Methods for CVE-2026-51893

Indicators of Compromise

• Unusual HTTP requests targeting the trace_mindmap route from unauthenticated or external sources.
• Requests containing object or tenant identifiers that do not correspond to the caller's session or API key context.
• Spikes in response payloads from trace_mindmap returning data for identifiers outside normal workflow sequences.

Detection Strategies

• Instrument the ragflow application to log the caller identity alongside every requested object identifier on trace_mindmap.
• Compare the tenant inferred from the session or token to the tenant of the returned object; alert on mismatches.
• Deploy web application firewall (WAF) rules that require authenticated session cookies or API tokens for the trace_mindmap path.

Monitoring Recommendations

• Monitor reverse proxy and application access logs for sequential or scripted enumeration of identifier parameters on ragflow endpoints.
• Alert on sudden increases in cross-tenant data egress volumes from the ragflow service.
• Capture network telemetry for the ragflow listener and route it to a centralized analytics platform for correlation with authentication events.

How to Mitigate CVE-2026-51893

Immediate Actions Required

• Restrict external exposure of ragflow 0.24.0 instances by placing them behind authenticated reverse proxies or VPN access.
• Disable or firewall the trace_mindmap route until an upstream fix is applied.
• Audit application logs for prior access attempts referencing identifiers outside expected tenant scope.

Patch Information

No vendor patch is listed in the NVD entry at the time of publication. Track the infiniflow ragflow repository for a release that supersedes 0.24.0 and introduces owner, tenant, or workspace binding on trace_mindmap. Review the referenced GitHub PoC Repository for the exact request pattern to block.

Workarounds

• Enforce authentication at a reverse proxy layer and strip anonymous requests to the ragflow API.
• Add middleware or proxy logic that validates the tenant claim in the caller's token against the requested identifier before the request reaches the application.
• Rotate tenant identifiers and API tokens if logs indicate cross-tenant access during the exposure window.

# Example nginx configuration to require authentication and block the vulnerable route
location /trace_mindmap {
    deny all;
    return 403;
}

location / {
    auth_request /_auth;
    proxy_pass http://ragflow_upstream;
}