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CVE-2026-104963— Plane: Workspace cycle and module endpoints missing project-membership filter expose private project metadata to any workspace member

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，通过 访问的 以及通过 访问的 接口，会返回工作区中所有项目下的记录，而未验证请求者是否属于各个具体项目。因此，任何经过身份验证的工作区成员（包括仅被授权访问单个项目的访客用户）均可枚举私有项目中周期（cycles）和模块（modules）的名称、描述、冲刺日期、问题数量、进度快照、外部集成 ID、关联链接 URL 以及成员列表。 相比之下，同级的 和 已正确应用 过滤条件，从而使得周期和模块相关接口成为存在权限检查不一致的异常接口。该问题已在 1.4

CVSS 4.3 · Medium
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I. Basic Information for CVE-2026-104963

Vulnerability Information
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Vulnerability Title
Plane: Workspace cycle and module endpoints missing project-membership filter expose private project metadata to any workspace member
Source: CVE Program / CVE List V5
Vulnerability Description
Plane is an open-source project management tool. Prior to 1.4.0, GET /api/workspaces/{slug}/cycles/ through WorkspaceCyclesEndpoint and GET /api/workspaces/{slug}/modules/ through WorkspaceModulesEndpoint return records from every project in a workspace without checking whether the requester belongs to each project. Any authenticated workspace member, including a Guest with access to only one project, can enumerate names, descriptions, sprint dates, issue counts, progress snapshots, external integration IDs, linked URLs, and member lists for cycles and modules in private projects. The sibling WorkspaceLabelsEndpoint and WorkspaceStatesEndpoint apply the correct project__project_projectmember__member=request.user filter, making the cycle and module endpoints inconsistent outliers. 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:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
makeplane plane < 1.4.0 -

II. Public POCs for CVE-2026-104963

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III. Intelligence Information for CVE-2026-104963

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Other References for CVE-2026-104963 (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-200

V. Comments for CVE-2026-104963

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