CVE-2026-85725LightRAG: Plaintext Passwords Compared Without Constant-Time Function
Updated under an hour ago ()
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It affects HKUDS LightRAG. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-208
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
HKUDS LightRAG hkuds:lightrag (from the name) | before 1.5.5 | CNA record |
References
- https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwqx-refsource-confirm
- https://github.com/HKUDS/LightRAG/pull/3423x-refsource-misc
- https://github.com/HKUDS/LightRAG/commit/89849c3ed0e0380345a6b5bade027cfb9a5bf32cx-refsource-misc
- https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.