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CVE-2026-80191— GROWI before 8.0.2 Missing Authorization on Attachment Retrieval for Unauthenticated Requests

Quick assessment

Affected
GROWI, Inc. GROWI
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.

GROWI是日本GROWI组织开源的一款基于 Node.js 和 React 构建的企业级开源知识库/维基(Wiki)系统。 GROWI 8.0.2之前版本存在授权问题漏洞，该漏洞源于权限检查不充分，未认证用户可通过/attachment/:id和/download/:id路由绕过页面查看权限检查，访问附件文件，导致信息泄露。

CVSS 7.5 · High EPSS 0.48% · P41

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
GROWI, Inc. GROWI < 8.0.2 affected
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I. Basic Information for CVE-2026-80191

Vulnerability Information
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Vulnerability Title
GROWI before 8.0.2 Missing Authorization on Attachment Retrieval for Unauthenticated Requests
Source: CVE Program / CVE List V5
Vulnerability Description
GROWI applies its page-viewer permission check to attachment requests only when the request carries an authenticated user. retrieveAttachmentFromIdParam in apps/app/src/server/routes/attachment/get.ts guards the check with a condition requiring the user to be non-null, so a request that carries no session skips the check entirely and the handler returns the file. The routes reached this way, /attachment/:id and /download/:id, take the attachment identifier from the path, so an unauthenticated caller who has an attachment identifier receives the file regardless of whether the page owning it is private and regardless of whether that caller would be permitted to view the page. Identifiers can be retained by a user whose access was later removed, or recovered from anywhere the identifier was previously exposed. Version 8.0.2 runs the check for authenticated and unauthenticated requests alike, skipping it only where a valid share link has already bound the requested file to that link's page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
GROWI 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GROWI是日本GROWI组织开源的一款基于 Node.js 和 React 构建的企业级开源知识库/维基(Wiki)系统。 GROWI 8.0.2之前版本存在授权问题漏洞，该漏洞源于权限检查不充分，未认证用户可通过/attachment/:id和/download/:id路由绕过页面查看权限检查，访问附件文件，导致信息泄露。
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
GROWI, Inc. GROWI 0 ~ 8.0.2 -

II. Public POCs for CVE-2026-80191

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 12483 chars
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III. Intelligence Information for CVE-2026-80191

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Patches & Fixes for CVE-2026-80191 (1)

Vendor Advisories for CVE-2026-80191 (1)

Vendor Pages for CVE-2026-80191 (2)

IV. Related Vulnerabilities

Same product: GROWI
Same vendor: GROWI, Inc.
Same weakness: CWE-862

V. Comments for CVE-2026-80191

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