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CVE-2026-61740

CRITICAL Exploitation: PoC
9.3
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-61740
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-10 18:59 UTC
Published
2026-07-15 14:14 UTC
Last updated
2026-07-15 15:30 UTC
Primary CWE
CWE-287
CWE-287: Improper Authentication
Vendor / Product
HKUDS / LightRAG
Sources
cve.org  ·  NVD

Severity & Metrics

9.3 CRITICAL CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
HKUDS LightRAG — < 1.5.4
Weakness (CWE)
CWESourceDescription
CWE-287 cna CWE-287: Improper Authentication
CWE-798 cna CWE-798: Use of Hard-coded Credentials
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.3 CRITICAL 4.0 cna 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
References (4)
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