CVE-2026-85734: critical vulnerability in HKUDS LightRAG
LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.6%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
HKUDS · LightRAGRelated CVEs — HKUDS LightRAG
In the same product, most dangerous first.
CVE-2026-61808CRITICALLightRAG: Missing Authentication for Critical API Functions in Default ConfigurationEPSS 2.5%CVE-2026-61736CRITICALLightRAG: CORS Wildcard + Credentials Enables Any-Origin Credentialed RequestsEPSS 1.4%CVE-2026-61740CRITICALLightRAG: Authentication bypass: hardcoded DEFAULT_TOKEN_SECRET and public /auth-status defeat LIGHTRAG_API_KEY protectionEPSS 0.5%CVE-2026-85725MEDIUMLightRAG: Plaintext Passwords Compared Without Constant-Time FunctionEPSS 0.4%CVE-2026-85709MEDIUMLightRAG: Sensitive Information Exposure Through Raw Exception Messages in API Error ResponsesEPSS 0.4%CVE-2026-86062MEDIUMLightRAG: Stored Cross-Site Scripting (XSS) in the LightRAG WebUI chat/answer renderer via ingested contentEPSS 0.3%