Vulnerability in Hkuds Lightrag
CVE-2026-85734
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Hkuds Lightrag — versions < 1.5.5
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-85734?
- CVE-2026-85734 is a critical-severity vulnerability in Hkuds Lightrag, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 9.1/10. Published 2026-09-22.
- How severe is CVE-2026-85734?
- Critical severity. CVSS v3 base score is 9.1 out of 10.