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CVE-2026-104960— Plane: Authorization bypass in workspace-scoped asset download endpoint exposes secret project file assets to non-project workspace users

Quick assessment

Affected
makeplane plane
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Plane 是一款开源的项目管理工具。在 1.4.0 版本之前，Plane 会暴露一个工作区范围（workspace-scoped）的 GET 接口 ，用于下载与项目绑定的 FileAsset 对象，但并未验证访问者是否拥有该资产所属项目的访问权限。 攻击者只要满足以下条件： 1. 已认证成功； 2. 与受害者属于同一工作区（workspace）； 3. 并非受害者私有（secret）项目的成员； 4. 知道目标资产的 UUID； 即可触发一个 HTTP 302 重定向，指向一个带有签名的下载链接，从而获取该私有资

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-104960

Vulnerability Information
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Vulnerability Title
Plane: Authorization bypass in workspace-scoped asset download endpoint exposes secret project file assets to non-project workspace users
Source: CVE Program / CVE List V5
Vulnerability Description
Plane is an open-source project management tool. Prior to 1.4.0, Plane exposes the workspace-scoped GET /api/assets/v2/workspaces/{workspace_slug}/download/{asset_id}/ endpoint for project-bound FileAsset objects without enforcing access to the asset's owning project. An authenticated user who belongs to the same workspace, is not a member of the victim's secret project, and knows the target asset UUID can receive a 302 redirect to a signed download URL. The intended project-scoped route for the same asset correctly returns 403. Confirmed affected project-bound asset types are ISSUE_ATTACHMENT, COMMENT_DESCRIPTION, PAGE_DESCRIPTION, and PROJECT_COVER. This bypass exposes private file content protected by the secret project boundary. This issue is fixed in 1.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
makeplane plane < 1.4.0 -

II. Public POCs for CVE-2026-104960

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III. Intelligence Information for CVE-2026-104960

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Other References for CVE-2026-104960 (4)

Same Patch Batch · makeplane · 2026-10-05 · 38 CVEs total

CVE-2026-105636 9.9 CRITICAL Plane: SSRF via HTTP redirect in webhook delivery (allow_redirects not set)
CVE-2026-105639 9.8 CRITICAL Plane: Pre-auth workspace invitation hijack via email-squat and self-served invitation tok
CVE-2026-105641 9.8 CRITICAL Plane: Hardcoded SECRET_KEY and LIVE_SERVER_SECRET_KEY shipped in aio/cli community deploy
CVE-2026-105637 9.6 CRITICAL Plane: Cross-Project Asset Hijacking via 'ProjectBulkAssetEndpoint' (sibling of CVE-2026-4
CVE-2026-105638 9.1 CRITICAL Plane: Magic-code verifier endpoint has no rate limit, enabling 6-digit OTP brute force
CVE-2026-105640 9.1 CRITICAL Plane: Account Takeover via Unverified OAuth Email Match (Gitea, self-managed GitLab)
CVE-2026-104968 8.7 HIGH Plane: Cross-workspace member enumeration via /api/workspaces/{slug}/entity-search/
CVE-2026-105630 8.7 HIGH Plane: Stored XSS via SVG attachment served inline on the application origin (account take
CVE-2026-105632 8.7 HIGH Plane: Broken Access Control - joinProject GraphQL mutation allows self-join into private
CVE-2026-104979 8.7 HIGH Plane: Cross-tenant stored XSS in intake enables account takeover
CVE-2026-104976 8.7 HIGH Plane: SSRF in Gitea OAuth
CVE-2026-104966 8.7 HIGH Plane: Cross-Workspace IDOR in Estimate and Comment Endpoints Allows Read, Modify, and Inj
CVE-2026-104892 8.7 HIGH Plane: Plaintext logging of API token
CVE-2026-104971 8.5 HIGH Plane: Cross-Workspace Asset Duplication IDOR + WorkspaceFileAssetEndpoint and FileAssetEn
CVE-2026-104978 8.2 HIGH Plane: Invitation Hijack in Project Join Flow via Missing Authorization and Email-Only Acc
CVE-2026-105634 8.1 HIGH Plane: Privilege Escalation: Project Guest Can Demote Admin/Member Roles
CVE-2026-104974 8.1 HIGH Plane: Disabled User Auto-Reactivation on Login
CVE-2026-104970 8.1 HIGH Plane: InstanceAdminSignUpEndpoint TOCTOU race allows two concurrent unauthenticated calle
CVE-2026-104977 7.7 HIGH Plane: Incomplete fix of CVE-2026-27706 — SSRF still reachable on: missing is_blocked_ip (
CVE-2026-105628 7.6 HIGH Plane: OAuth Avatar Redirect SSRF Leads to Internal Data Exfiltration via Static Asset End

Showing top 20 of 38 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: plane
Same vendor: makeplane
Same weakness: CWE-639

V. Comments for CVE-2026-104960

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