LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks (CVE-2026-85734) | HOL Guard CVE

Critical · CVSS 9.1CVE-2026-85734

LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks

Answer in brief

CVE-2026-85734 records a Critical severity (CVSS 9.1) vulnerability in LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks. The current sources do not mark it as known exploited. The current feed maps HKUDS/LightRAG (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 22, 2026Updated Sep 22, 2026Source checked Sep 22, 2026First seen by HOL Sep 22, 2026Material review Sep 22, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps HKUDS/LightRAG (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
HKUDS/LightRAGgeneric	<1.5.5	1.5.5

Recommended response

Check inventory. Check lockfiles and deployed manifests for HKUDS/LightRAG.
Review the reported fix. Update HKUDS/LightRAG to 1.5.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 22, 2026

Sources and claim methodology

Upstream source description

LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, the POST /login endpoint in lightrag/api/lightrag_server.py does not impose a rate limit, account lockout, delay, or counter for failed authentication attempts. A network attacker can submit password guesses at full request speed until a valid account password is found. Successful credential recovery grants authenticated access to documents, the knowledge graph, and administrative operations. This issue is fixed in version 1.5.5.

Quoted source text, attributed separately from HOL analysis.