S4E just found a high top 10 tcp port service scan
high·Product Based Web Vulnerabilities·Updated Aug 14, 2026

CVE-2026-61808 Scanner

CVE-2026-61808 Scanner - Missing Authorization vulnerability in LightRAG

Est. Time~10 seconds
Scan TypeGroup Scan
Targetsdomain, subdomain, ipv4
CostFree
0
Times Used
by S4E users
0
Assets Scanned
domains & IPs
0
Vulnerabilities Found
confirmed findings
References
CVECVE-2026-61808
9.8
CVSScritical
Exploitable remotely over the internet · no authentication required.

LightRAG provides simple and fast retrieval-augmented generation. Through version 1.5.4, the LightRAG API server binds to all network interfaces with authentication disabled by default, allowing an unauthenticated network attacker to read indexed document content, upload or delete documents, modify the knowledge graph, cancel pipelines, clear caches, and consume LLM resources. This issue is mitigated in version 1.5.5rc1.

Attack Vector
Network
Privileges Req.
None
User Interaction
None
Affected
LightRAGby HKUDS
< 1.5.5rc1
Updated Aug 19, 2026View on NVD →
Detail

LightRAG is primarily used in environments where managing and accessing large sets of documents and resources is critical. Commonly adopted by document management companies and knowledge-base systems, it assists in indexing and retrieving information efficiently. Companies dealing with large volumes of data across various sectors like legal, research, and education utilize LightRAG. The software is designed to streamline data handling operations, contributing to operational efficiency and productivity. It's typically deployed in corporate settings where quick access to organized information is necessary. Additionally, LightRAG is favored for its customization capacity in handling specific industry requirements.

This vulnerability involves a flaw where LightRAG lacks proper access control, allowing unauthenticated users to access critical resources. It is particularly dangerous because unauthorized individuals can gain control over sensitive documents, leading to potential data breaches. The vulnerability can be exploited without any special privileges or user interaction, making it a significant concern for systems using affected versions. Unchecked, it can lead to various security risks including unauthorized data modification and service disruption. The impact of exploiting this vulnerability can be severe, potentially allowing attackers to execute actions reserved for authenticated users. It poses a risk to the integrity and confidentiality of the data managed by LightRAG systems.

The vulnerability is located in LightRAG's API server, which binds to all network interfaces without requiring authentication. Specifically, the `/documents` endpoint allows access to data representations, including the content summary and file paths, without proper verification. Affected systems will respond with detailed information about documents whenever a request is made to this endpoint, exposing themselves to anyone with network access. The lack of authentication checks at this point means that control over the data is possible without credentials. The potential for an unauthorized party to read and tamper with document statuses represents a serious security threat. This deficiency in securing the API server's configuration is a critical oversight that compromises the system's safety.

Exploiting this vulnerability can lead to several adverse outcomes. Attackers could gain unauthorized access to sensitive documents, which they might read, modify, or delete. Such actions could disrupt normal operations and cause a complete system compromise, including data theft or corruption. Furthermore, the embezzlement of resources could result in denial of service, leaving legitimate users unable to access the system. This exploitation could severely affect the reputation and operational capacity of businesses relying on LightRAG. The lack of proper access controls invites dangers that could have lasting impacts on data security and client trust. Consequently, addressing this issue promptly is crucial to maintaining system integrity.

REFERENCES

Solution Advice
  • Upgrade LightRAG to version 1.5.5rc1 or later to mitigate this vulnerability.
  • Implement proper authentication mechanisms on all critical endpoints to ensure unauthorized access is prohibited.
  • Review and restrict API endpoint permissions to limit exposure to the minimum required access.
  • Regularly audit and monitor network interfaces to detect any unauthorized access attempts promptly.
  • Train staff on the implications of security vulnerabilities and emphasize the importance of maintaining updated systems.

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