Vulnerability in Hkuds Lightrag
CVE-2026-85725
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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-2026-85725?
- CVE-2026-85725 is a medium-severity vulnerability in Hkuds Lightrag, classified under CWE-208. CVSS score: 5.9/10. Published 2026-09-22.
- How severe is CVE-2026-85725?
- Medium severity. CVSS v3 base score is 5.9 out of 10.