TI-2026-58827 Aliases CVE-2026-85725 GHSA-c759-cx9p-mrwq

LightRAG: Plaintext Passwords Compared Without Constant-Time Function

MEDIUM 60CWE-208Published 2026-09-22 · Updated 2026-09-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-208.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00446 39th percentileScored 2026-11-07

Fix Fixed LightRAG (HKUDS): 1.5.5lightrag-hku (PyPI): 1.5.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
HKUDS	LightRAG	before 1.5.5	1.5.5	Patch available	CNA
—	lightrag-hku (PyPI)	before 1.5.5	1.5.5	Patch available	GHSA-c759-cx9p-mrwq

LightRAG VendorHKUDS Affected before 1.5.5 Fixed in 1.5.5 Patch available CNA
lightrag-hku (PyPI) Vendor— Affected before 1.5.5 Fixed in 1.5.5 Patch available GHSA-c759-cx9p-mrwq

Remediation

Fix · CNA LightRAG (HKUDS) Fixed in 1.5.5
Fix · GHSA-c759-cx9p-mrwq lightrag-hku (PyPI) Fixed in 1.5.5 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-85725
2026-10-03 Alias added: GHSA-c759-cx9p-mrwq

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-85725

Other 5

TI-2026-44237 LightRAG: Missing Authentication for Critical API Functions in Default Configuration CVSS 3.1CRITICAL 9.8
TI-2026-78721 Missing authentication in HKUDS Vibe-Trading FastAPI server enables RCE CVSS 4.0CRITICAL 9.3
TI-2026-44184 Improper authentication in HKUDS LightRAG CVSS 4.0CRITICAL 9.3
TI-2026-26034 Zero-Click Indirect Prompt Injection and Authentication Bypass via Email Polling CVSS 4.0HIGH 8.9
TI-2026-62432 HKUDS nanobot before 0.3.0 Server-Side Request Forgery via WebFetchTool CVSS 4.0CRITICAL 9.2
TI-2026-25310 DeepCode 1.2.0 Path Traversal via SPA Catch-All Route in main.py CVSS 4.0HIGH 8.7

See all 47 →

Sources

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