What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-05 · updated 2026-10-05
• Weakness: CWE-639

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.

Affected products

• makeplane plane: before 1.4.0

References

• https://github.com/makeplane/plane/commit/e63f0c3b3404d669ae05dd9050aab72292f87e5c
• https://github.com/makeplane/plane/pull/9372
• https://github.com/makeplane/plane/releases/tag/v1.4.0
• https://github.com/makeplane/plane/security/advisories/GHSA-wrrw-wvfv-67h7
• https://github.com/makeplane/plane/security/advisories/GHSA-wrrw-wvfv-67h7

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