Description
Plane is an open-source project management tool. Prior to 1.4.0, Plane's dashboard asset endpoints in plane/app/views/asset/v2.py were remediated for two cross-tenant asset IDORs, CVE-2026-27705 and CVE-2026-46558. Those fixes added a membership check and project_id and workspace__slug scoping to the asset endpoints in that file. The Spaces app in plane/space/views/asset.py serves related public-board operations under /api/public/ but was not remediated. Its EntityAssetEndpoint and AssetRestoreEndpoint resolve a DeployBoard from a public anchor and then read or modify FileAsset rows scoped only to the board's workspace, without a membership check or project_id constraint. An attacker can therefore read, overwrite, or restore assets across projects and workspaces. This issue is fixed in 1.4.0.
Published: 2026-10-05
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Cross-tenant authorization bypass exposing assets
Action: Apply Patch
AI Analysis

Impact

Plane's public-board endpoints allowed unauthenticated access to asset operations without verifying project or workspace membership. This flaw, classified as a broken access control, enabled attackers to read, overwrite, or restore assets from any project or workspace. The vulnerability arises from missing membership checks and scoping constraints in the EntityAssetEndpoint and AssetRestoreEndpoint. The impact includes unauthorized disclosure, modification, and potential data loss for users across all projects using the affected Plane deployment.

Affected Systems

The open‑source management tool Plane, from vendor makeplane, is affected in all releases prior to 1.4.0. The specific flaw resides in plane/space/views/asset.py, which handles public‑board API calls under /api/public/. Users running any version of Plane before the 1.4.0 release are thus vulnerable.

Risk and Exploitability

The CVSS score of 7.1 indicates moderate to high severity. The EPSS score is not available, so the precise likelihood of exploitation is unknown, but the is deployable via the publicly exposed API without needing privileged credentials. Because it is listed in no KEV catalog, no active exploits are reported, yet the confluence of wide exposure and elevated impact warrants timely.

Generated by OpenCVE AI on October 5, 2026 at 18:50 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade makeplane:plane to version 1.4.0 or later; this patch adds required membership checks that mitigate the broken access control flaw (CWE-639).
  • Block public access to the /api/public/ spaces endpoints via network or application firewall rules to prevent unauthorized asset operations until a patch is applied, thereby temporarily mitigating the broken access control vulnerability (CWE-639).
  • If an upgrade cannot be immediately performed, modify the EntityAssetEndpoint and AssetRestoreEndpoint to enforce project and workspace membership checks, satisfying the CWE-639 access control requirements.

Generated by OpenCVE AI on October 5, 2026 at 18:50 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Mon, 05 Oct 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Makeplane
Makeplane plane
Vendors & Products Makeplane
Makeplane plane

Mon, 05 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 05 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Description Plane is an open-source project management tool. Prior to 1.4.0, Plane's dashboard asset endpoints in plane/app/views/asset/v2.py were remediated for two cross-tenant asset IDORs, CVE-2026-27705 and CVE-2026-46558. Those fixes added a membership check and project_id and workspace__slug scoping to the asset endpoints in that file. The Spaces app in plane/space/views/asset.py serves related public-board operations under /api/public/ but was not remediated. Its EntityAssetEndpoint and AssetRestoreEndpoint resolve a DeployBoard from a public anchor and then read or modify FileAsset rows scoped only to the board's workspace, without a membership check or project_id constraint. An attacker can therefore read, overwrite, or restore assets across projects and workspaces. This issue is fixed in 1.4.0.
Title Plane: Cross-tenant asset authorization bypass in Plane Spaces public-board endpoints
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'}

Subscriptions

Makeplane Plane
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-05T18:00:17.007Z

Reserved: 2026-10-02T18:16:13.629Z

Link: CVE-2026-104975

cve-icon Vulnrichment

Updated: 2026-10-05T18:00:03.436Z

cve-icon NVD

Status : Deferred

Published: 2026-10-05T18:17:32.747

Modified: 2026-10-05T19:17:15.657

Link: CVE-2026-104975

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-05T19:00:15Z

Weaknesses
  • CWE-639

    Authorization Bypass Through User-Controlled Key