CVE-2026-85740Network attack vectorHinoki check available

SSRF via IPv6-transition wrapper validation bypass

Published Sep 22, 2026 · Updated Sep 22, 2026

SSRF in LightRAG before 1.5.5 allows attackers to fetch internal resources through crafted image URLs in uploaded documents. _validated_addresses checks the IPv6 literal with ipaddress.is_global without consistently evaluating the embedded IPv4 address, so _download accepts transition wrappers around loopback, private, or metadata targets. Exploitation requires document-upload access and compatible NAT64 or DNS64 routing; the fetched response body is ingested into LightRAG.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

SSRF in LightRAG before 1.5.5 allows attackers to fetch internal resources through crafted image URLs in uploaded documents. _validated_addresses checks the IPv6 literal with ipaddress.is_global without consistently evaluating the embedded IPv4 address, so _download accepts transition wrappers around loopback, private, or metadata targets. Exploitation requires document-upload access and compatible NAT64 or DNS64 routing; the fetched response body is ingested into LightRAG.

The record

CVE
CVE-2026-85740
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Data Intelligence Lab @ HKU
Product
LightRAG
Classifications
T1190
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Data Intelligence Lab @ HKU · LightRAGversion=< 1.5.5

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started