CVE-2026-84301Public exploitNetwork attack vectorHinoki check available

Authenticated SSRF via DNS rebinding race

Published Sep 22, 2026 · Updated Sep 22, 2026

SSRF in Labring FastGPT before 4.15.2 allows remote authenticated users to reach protected internal services via DNS rebinding. The shared safe Axios interceptor in packages/service/common/api/axios.ts checks isInternalAddress(), but the later socket lookup independently resolves the attacker-controlled hostname and can receive a private address. An authenticated user must supply a URL through an HTTP tool, workflow node, external file fetch, or another protected integration; successful exploitation permits server-side connections to loopback, link-local, metadata, or private-network services.

CVSS severity6.3
Medium
EPSS probability0.29%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in Labring FastGPT before 4.15.2 allows remote authenticated users to reach protected internal services via DNS rebinding. The shared safe Axios interceptor in packages/service/common/api/axios.ts checks isInternalAddress(), but the later socket lookup independently resolves the attacker-controlled hostname and can receive a private address. An authenticated user must supply a URL through an HTTP tool, workflow node, external file fetch, or another protected integration; successful exploitation permits server-side connections to loopback, link-local, metadata, or private-network services.

The record

CVE
CVE-2026-84301
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Labring
Product
FastGPT
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
authenticated

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

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Is a vulnerable build present?

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

  1. Affected versionversion=< 4.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Labring · FastGPTversion=< 4.15.2

Published CVSS scores

6.3GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1552.005Unsecured Credentials: Cloud Instance Metadata API

Public exploit references

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Technologies

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