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CVE-2026-54607— FastGPT: SSRF in HTTP-tool OpenAPI schema importer via SwaggerParser $ref (bypasses the isInternalAddress guard)

Quick assessment

Affected
labring FastGPT
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

labring FastGPT是labring公司开源的一款基于大语言模型的开源知识库问答系统。 labring FastGPT 4.15.0-beta4之前版本存在服务端请求伪造漏洞，该漏洞源于HTTP-tool OpenAPI schema导入器在将URL传递给SwaggerParser.bundle之前仅验证顶层URL，其远程引用解析器在获取$ref URL时没有FastGPT内部地址保护并将获取的内容内联返回，可能导致经过身份验证的团队成员读取内部服务或云元数据。

CVSS 7.7 · High EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1592.008

Affected Version Matrix 1

VendorProduct Version RangeStatus
labring FastGPT < 4.15.0-beta4 affected
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I. Basic Information for CVE-2026-54607

Vulnerability Information
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Vulnerability Title
FastGPT: SSRF in HTTP-tool OpenAPI schema importer via SwaggerParser $ref (bypasses the isInternalAddress guard)
Source: CVE Program / CVE List V5
Vulnerability Description
FastGPT is a knowledge-based AI application platform. Prior to 4.15.0-beta4, the HTTP-tool OpenAPI schema importer validates only the top-level URL before passing it to SwaggerParser.bundle, whose remote reference resolver fetches $ref URLs without FastGPT's internal-address guard and returns fetched content inline, allowing an authenticated team member to read internal services or cloud metadata. This issue is fixed in version 4.15.0-beta4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
labring FastGPT 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
labring FastGPT是labring公司开源的一款基于大语言模型的开源知识库问答系统。 labring FastGPT 4.15.0-beta4之前版本存在服务端请求伪造漏洞，该漏洞源于HTTP-tool OpenAPI schema导入器在将URL传递给SwaggerParser.bundle之前仅验证顶层URL，其远程引用解析器在获取$ref URL时没有FastGPT内部地址保护并将获取的内容内联返回，可能导致经过身份验证的团队成员读取内部服务或云元数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
labring FastGPT < 4.15.0-beta4 -

II. Public POCs for CVE-2026-54607

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 12794 chars
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III. Intelligence Information for CVE-2026-54607

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Patches & Fixes for CVE-2026-54607 (2)

Vendor Advisories for CVE-2026-54607 (1)

Vendor Pages for CVE-2026-54607 (1)

Same Patch Batch · labring · 2026-07-07 · 4 CVEs total

CVE-2026-55418 8.6 HIGH FastGPT: S3 presign/read handlers do not bind the object key to the caller's team (cross-t
CVE-2026-54601 6.3 MEDIUM FastGPT: reTrainingCollection allows server-owned datasetId override causing cross-tenant
CVE-2026-54602 FastGPT: Cross-team LLM request/response disclosure (IDOR) via /api/core/ai/record/getReco

IV. Related Vulnerabilities

Same product: FastGPT
Same vendor: labring
Same weakness: CWE-918

V. Comments for CVE-2026-54607

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