CVE-2026-85734
LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, the POST /login endpoint in lightrag/api/lightrag_server.py does not impose a rate limit, account lockout, delay, or counter for failed authentication attempts. A network attacker can submit password guesses at full request speed until a valid account password is found. Successful credential recovery grants authenticated access to documents, the knowledge graph, and administrative operations. This issue is fixed in version 1.5.5.
| CWE | CWE-307 |
| Vendor | hkuds |
| Product | lightrag |
| Published | Sep 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
HKUDS / LightRAG
< 1.5.5
References
github.com: https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx github.com: https://github.com/HKUDS/LightRAG/pull/3424 github.com: https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54 github.com: https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5