CVE-2026-85734

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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: CRITICAL
CVSS score: 9.1 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Effective score: 9.1 / 10 CRITICAL source: CNA overview
CWE(s): CWE-307
Reserved: 2026-09-04
Published: 2026-09-22 16:18 UTC
Last updated: 2026-09-22 17:43 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/85xxx/CVE-2026-85734.json
Linked Threat: CVE-2026-85734 — LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-22 17:17:27 UTC
NVD last modified: 2026-09-22 18:17:23 UTC
NVD CVSS v3.1: 9.1 / 10 CRITICAL source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploitability subscore: 3.9 / 10
Impact subscore: 5.2 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-84548
Assigner: GitHub_M
Published: Sep 22, 2026, 4:18:14 PM
Updated: Sep 22, 2026, 5:43:42 PM
EUVD base score (CVSS 3.1): 9.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EUVD-reported EPSS: 0.0000
Vendors: HKUDS
Products: LightRAG (< 1.5.5)
Aliases: GHSA-frch-4w6v-q5xx

ENISA 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.

EUVD references (4)

Affected products (1)

Vendor	Product	Versions	Platforms
HKUDS	LightRAG	`< 1.5.5` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx x_refsource_CONFIRM
https://github.com/HKUDS/LightRAG/pull/3424 x_refsource_MISC
https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54 x_refsource_MISC
https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5 x_refsource_MISC

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54 security-advisories@github.com
https://github.com/HKUDS/LightRAG/pull/3424 security-advisories@github.com
https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5 security-advisories@github.com
https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx security-advisories@github.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-85734 - Vulnerability Details - OpenCVE

web:app.opencve.io

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

2026-09-23 15:14 UTC
CVE-2026-85734 - Exploits & Severity - Feedly

web:feedly.com

The manipulation results in improper restriction of excessive authentication attempts. This vulnerability was named CVE-2026-85734 . The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

2026-09-23 15:14 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-23 15:14 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-23 15:14 UTC
SAP Security Patch Day - June 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-23 15:14 UTC
SAP Security Patch Day - May 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 12 th of May 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-23 15:14 UTC
How To Patch After Microsoft Confirms 973 Security Vulnerabilities - Forbes

web:www.forbes.com

Microsoft has patched 973 vulnerabilities, including actively exploited Windows CVE - 2026 -85880 and CVE - 2026 -81963 bugs. How should your organization respond to stay safe?

2026-09-23 15:14 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-23 15:14 UTC
CVE-2026-85734: HKUDS LightRAG: LightRAG provides simple and ... - Rapid7

web:www.rapid7.com

CVE-2026-85734 : HKUDS LightRAG: LightRAG provides simple and fast retrieval-augmented generation. View severity, references, and remediation details from Rapid7.

2026-09-23 15:14 UTC
CVE-2026-85734 | Tenable®

web:www.tenable.com

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 ...

2026-09-23 15:14 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-85734.json.

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