CVE-2026-105631: Plane: asset download endpoints scope file lookups to the workspace (not the project / published entity) → cross-project & unauthenticated private-file disclosure

Q: Who can access the affected files?

A workspace member who knows an asset UUID can download assets from private projects in that workspace, even without membership in the asset's project. Unauthenticated callers can retrieve certain issue-description or comment-description assets if they know both a valid public anchor and the asset UUID.

Q: What information is required to exploit the issue?

For the workspace asset endpoints, the attacker needs membership in the relevant workspace and a known asset UUID. For the public-anchor endpoint, no authentication is required, but the caller must know a valid anchor and the target asset UUID.

Q: Which deployments are affected?

Plane versions prior to 1.4.0 are affected. The issue involves file assets associated with private or unpublished projects within a workspace.

Q: How can the issue be remediated?

Upgrade Plane to version 1.4.0, which fixes the affected asset lookup behavior.

Published Oct 5, 2026

Updated

Plane is an open-source project management tool. Prior to 1.4.0, WorkspaceFileAssetEndpoint.get and WorkspaceAssetDownloadEndpoint.get resolve FileAsset records within a workspace without checking membership in the asset's project, allowing a workspace member to download assets from private projects when the asset UUID is known. EntityAssetEndpoint.get is a separate public-anchor endpoint that grants AllowAny access and scopes the lookup only to the anchor's workspace rather than its published entity or project. An unauthenticated caller who knows a valid anchor and an asset UUID can therefore retrieve issue-description or comment-description assets belonging to unpublished or private projects in that workspace. This issue is fixed in 1.4.0.

Affected Software

1 affected component

Plane Plane<1.4.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Plane to a version that resolves this vulnerability.
Fixed in 1.4.0

Event History

Oct 5, 2026

CVE Published

via MITRE·05:55 PM

Data Sourced

via MITRE·05:55 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·06:17 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Who can access the affected files?

A workspace member who knows an asset UUID can download assets from private projects in that workspace, even without membership in the asset's project. Unauthenticated callers can retrieve certain issue-description or comment-description assets if they know both a valid public anchor and the asset UUID.

What information is required to exploit the issue?