---
cve: "CVE-2026-85725"
severity: "MEDIUM"
cvss: 5.9
epss: "0.4%"
vendor: "HKUDS"
kev: false
exploited: false
published: "2026-09-22 17:17:27"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T11:22:24+02:00"
---

# CVE-2026-85725

> 5.9 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 89849c3ed0e0380345a6b5bade027cfb9a5bf32c (Commit)
- 22ea2d0cbfa2b7002aa118bd0bf1780a69d489bc (Commit)

## Referenzen

- <https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq>
- <https://github.com/HKUDS/LightRAG/pull/3423>
- <https://github.com/HKUDS/LightRAG/commit/89849c3ed0e0380345a6b5bade027cfb9a5bf32c>
- <https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-85725) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_