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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 的附件请求权限检查仅在请求携带已认证用户时才执行。 函数（位于 ）通过一个要求用户对象非空的条件来守卫该权限检查，因此，未携带会话信息的请求将完全绕过此检查，处理器直接返回文件。 通过 和 这两个路由可到达上述逻辑，它们从 URL 路径中获取附件标识符。因此，拥有附件标识符的未认证调用者无论该附件所属页面是否为私有，也无论其是否被允许查看该页面，均可直接获取该文件。标识符可能被后续访问权限被移除的用户保留，或从此前暴露过该标识符的任何位置恢复获取。 在版本 8.0.2 中，系统对已认证和未认证的请求均执

CVSS 7.5 · High EPSS 0.36% · P29

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

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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