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CVE-2026-61740— LightRAG: Authentication bypass: hardcoded DEFAULT_TOKEN_SECRET and public /auth-status defeat LIGHTRAG_API_KEY protection

Quick assessment

Affected
HKUDS LightRAG
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HKUDS LightRAG是HKUDS开源的一款检索增强生成框架。 HKUDS LightRAG 1.5.4之前版本存在安全漏洞，该漏洞源于硬编码令牌和认证绕过问题，可能导致远程未经身份验证的攻击者调用受保护的端点，包括文档读取、上传、删除、图形变更和查询端点。

AI Predicted 9.8 Difficulty: Easy EPSS 0.66% · P50

Affected Version Matrix 1

VendorProduct Version RangeStatus
HKUDS LightRAG < 1.5.4 affected
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I. Basic Information for CVE-2026-61740

Vulnerability Information
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Vulnerability Title
LightRAG: Authentication bypass: hardcoded DEFAULT_TOKEN_SECRET and public /auth-status defeat LIGHTRAG_API_KEY protection
Source: CVE Program / CVE List V5
Vulnerability Description
LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, when LightRAG is deployed with LIGHTRAG_API_KEY set but AUTH_ACCOUNTS unset, X-API-Key protection can be bypassed because lightrag/api/auth.py falls back to a hardcoded DEFAULT_TOKEN_SECRET, /auth-status and /login can mint guest JWTs, and combined_dependency in lightrag/api/utils_api.py accepts a valid guest token before checking the API key. A remote unauthenticated attacker can call endpoints guarded by combined_auth, including document read, upload, deletion, graph mutation, and query endpoints. This vulnerability is fixed in 1.5.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
HKUDS LightRAG 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HKUDS LightRAG是HKUDS开源的一款检索增强生成框架。 HKUDS LightRAG 1.5.4之前版本存在安全漏洞，该漏洞源于硬编码令牌和认证绕过问题，可能导致远程未经身份验证的攻击者调用受保护的端点，包括文档读取、上传、删除、图形变更和查询端点。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HKUDS LightRAG < 1.5.4 -

II. Public POCs for CVE-2026-61740

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III. Intelligence Information for CVE-2026-61740

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Patches & Fixes for CVE-2026-61740 (2)

Vendor Advisories for CVE-2026-61740 (1)

Other References for CVE-2026-61740 (1)

IV. Related Vulnerabilities

Same product: LightRAG
Same vendor: HKUDS
Same weakness: CWE-287

V. Comments for CVE-2026-61740

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