# CVE-2026-104960: Missing authorization in plane

> An authenticated user can download private files from secret projects they do not belong to by accessing a workspace-scoped asset endpoint.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-wrrw-wvfv-67h7

## What is CVE-2026-104960?

CVE-2026-104960 is a medium-severity missing authorization vulnerability in makeplane plane, published on 5 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-862 (Missing Authorization), CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-104960?


## How do I fix CVE-2026-104960?

No fix has been published for CVE-2026-104960 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104960 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104960 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104960 and fix it if it is affected.

What it is: CVE-2026-104960 is a medium-severity missing authorization vulnerability in makeplane plane, published on 5 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104960 exists.

Affected product: makeplane plane. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-104960/ (Markdown: https://insights.sbomify.com/CVE-2026-104960/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104960
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104960
- OSV: https://osv.dev/vulnerability/CVE-2026-104960

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-104960/
Summaries are generated and may contain mistakes; the official description above is the record.