CVE-2026-104189— Nextcloud 3D viewer 流媒体密码绕过漏洞
一分钟漏洞结论
影响对象
maz1987in 3Dviewer-Nextcloud
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Nextcloud 的 3D Viewer 是一款功能全面的 3D 模型查看器应用，支持多种 3D 文件格式。在版本 1.7.9 至 3.3.1 中，该应用的公开文件端点未执行分享授权检查。任何知晓分享令牌（share token）的用户，即使该链接分享设置了密码保护，也能读取共享文件的内容。 具体原因如下： 继承自 ，并将其路由标记为 。 Nextcloud 仅通过 强制实施分享密码验证，而该中间件会对非 实例的控制器提前返回，导致密码、有效期及分享类型检查均未在这些路由上执行。 进一步加剧了问题，它将任何通过
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一、 漏洞 CVE-2026-104189 基础信息
漏洞信息
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Vulnerability Title
3Dviewer-Nextcloud: Share password not enforced when streaming 3D models from a public link share
来源: CVE Program / CVE List V5
Vulnerability Description
The 3D Viewer for Nextcloud is a comprehensive 3D model viewer application for Nextcloud that supports multiple 3D file formats. In versions 1.7.9 through 3.3.1, the app's public file endpoint performed no share authorization. Anyone who knows a share token could read the shared file's contents even when the link share was protected by a password. `PublicFileController` extended `OCP\AppFramework\Controller` and marked its routes `#[PublicPage]`. Nextcloud only enforces share passwords through `PublicShareMiddleware`, which returns early for any controller that is not an `OCP\AppFramework\PublicShareController` instance — so no password, expiry, or share-type check ran for these routes. `ShareFileService::loadLinkShare()` compounded this by treating any token that `getShareByToken()` matched as authorised. A share token is the part of the URL that people paste into chats, emails, and tickets. Password protection exists precisely for the case where holding the token should not by itself grant access, and that guarantee did not hold. Requests to `GET /ocs/v2.php/apps/threedviewer/public/file/{token}/{fileId}` returned `200` with the full file body for password-protected shares, with no password and no session. Nextcloud's own share page correctly redirected such requests to the password prompt. Scope is limited to files in the formats this app handles (STL, GLB/glTF, OBJ, STEP, IFC, and the other supported 3D types). Non-3D files in the same share are unaffected. Expired shares returned `500` rather than leaking contents. This issue is fixed in 3.3.2. `PublicFileController` now extends `PublicShareController` and implements `isValidToken()`, `isPasswordProtected()`, and `getPasswordHash()`, delegating password and token validation to the framework and gaining brute-force throttling. `ShareFileService::findValidLinkShare()` additionally rejects share types other than link and email, rejects expired shares, and treats a `ShareNotFound` from the share manager as "no share" instead of letting it surface as a 500. As a workaround, disable the 3D Viewer app (`occ app:disable threedviewer`), or avoid relying on passwords to protect link shares that contain 3D model files, until you can upgrade.
来源: 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
来源: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| maz1987in | 3Dviewer-Nextcloud | >= 1.7.9, < 3.3.2 | - |
|
二、漏洞 CVE-2026-104189 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-104189 其他参考 (4)
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https://github.com/maz1987in/3Dviewer-Nextcloud/releases/tag/v3.3.2 x_refsource_MISC