CVE-2026-85725: Hkuds Lightrag

Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days.

LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, verify_password in lightrag/api/passwords.py compares plaintext AUTH_ACCOUNTS password values with Python's == operator. The comparison can return after the first mismatching byte, creating response-time differences based on password length and matching prefixes. A network attacker with sufficiently low-latency access can repeatedly query the /login endpoint and use the timing oracle to recover a plaintext-configured password character by character. Deployments using bcrypt-prefixed password values are not affected by this comparison path. This issue is fixed in version 1.5.5.

Affected products

• Hkuds Lightrag: before 1.5.5 (fixed in 1.5.5)

Published 2026-09-22. Last modified 2026-09-26.