# CVE-2026-24901: Outline's IDOR allows unauthorized viewing and seizing of private deleted drafts

> Attackers can view and seize ownership of other users' deleted drafts by bypassing ownership checks in the restore process.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 17 Mar 2026
- **Updated:** 17 Mar 2026
- **Also known as:** GHSA-gmr5-43f5-79f5

## What is CVE-2026-24901?

CVE-2026-24901 is a high-severity missing authorization vulnerability in outline, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Outline is a service that allows for collaborative documentation. Prior to 1.4.0, an Insecure Direct Object Reference (IDOR) vulnerability in the document restoration logic allows any team member to unauthorizedly restore, view, and seize ownership of deleted drafts belonging to other users, including administrators. By bypassing ownership validation during the restore process, an attacker can access sensitive private information and effectively lock the original owner out of their own content. Version 1.4.0 fixes the issue.

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

## Which versions are affected by CVE-2026-24901?

It affects 1 product.


Products: Getoutline Outline.

## How do I fix CVE-2026-24901?

No fix has been published for CVE-2026-24901 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-24901 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-24901 exists.

## Other vulnerabilities in outline

- [CVE-2026-33640](https://insights.sbomify.com/CVE-2026-33640/): Outline has a rate limit bypass that allows brute force of email login OTP (critical 9.1)
- [CVE-2024-37829](https://insights.sbomify.com/CVE-2024-37829/): Auth bypass in n/a (high 8.8)
- [CVE-2023-54331](https://insights.sbomify.com/CVE-2023-54331/): Outline 1.6.0 - Unquoted Service Path (high 8.5)
- [CVE-2023-3532](https://insights.sbomify.com/CVE-2023-3532/): Cross-site Scripting (XSS) - Stored in outline/outline (high 8.5)
- [CVE-2026-41649](https://insights.sbomify.com/CVE-2026-41649/): Outline has IDOR in document share creation that allows unauthorized access to private documents across workspaces (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-24901 and fix it if it is affected.

What it is: CVE-2026-24901 is a high-severity missing authorization vulnerability in outline, published on 17 Mar 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-2026-24901 exists.

Affected product: outline. 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-2026-24901/ (Markdown: https://insights.sbomify.com/CVE-2026-24901/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-24901
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24901
- OSV: https://osv.dev/vulnerability/CVE-2026-24901

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-24901/
Summaries are generated and may contain mistakes; the official description above is the record.