CVE-2026-85725
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
22/09/2026
Last modified:
22/09/2026
Description
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.
Impact
Base Score 3.x
5.90
Severity 3.x
MEDIUM