# CVE-2017-0920: Missing authorization in GitLab Community and Enterprise Editions

> An attacker can view all project names and namespaces on a GitLab instance due to an authorization bypass in the merge request creation controller.

- **Severity:** Medium 4.3 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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:** Yes
- **Published:** 22 Mar 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-vg8q-6f88-6vrh

## What is CVE-2017-0920?

CVE-2017-0920 is a medium-severity missing authorization vulnerability in Gitlab Gitlab, published on 22 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

GitLab Community and Enterprise Editions before 10.1.6, 10.2.6, and 10.3.4 are vulnerable to an authorization bypass issue in the Projects::MergeRequests::CreationsController component resulting in an attacker to see every project name and their respective namespace on a GitLab instance.

Weakness: CWE-863 (Incorrect Authorization), CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2017-0920?

It affects 1 product.


Products: Gitlab Gitlab.

## How do I fix CVE-2017-0920?

Upgrade to a fixed version.

## Is CVE-2017-0920 being exploited?

There is no known exploitation of CVE-2017-0920 in the wild and no public exploit code.

## Other vulnerabilities in Gitlab Gitlab

- [CVE-2026-97229](https://insights.sbomify.com/CVE-2026-97229/): GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound (critical 10.0, exploited in the wild)
- [CVE-2026-85706](https://insights.sbomify.com/CVE-2026-85706/): GitLab Community Edition and Enterprise Edition Path Traversal (critical 10.0, exploited in the wild)
- [CVE-2023-7028](https://insights.sbomify.com/CVE-2023-7028/): GitLab Community and Enterprise Editions Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2021-22205](https://insights.sbomify.com/CVE-2021-22205/): GitLab Community and Enterprise Editions Remote Code Execution (critical 10.0, exploited in the wild)
- [CVE-2021-39935](https://insights.sbomify.com/CVE-2021-39935/): GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) (medium 6.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-0920 and fix it if it is affected.

What it is: CVE-2017-0920 is a medium-severity missing authorization vulnerability in Gitlab Gitlab, published on 22 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-0920 in the wild and no public exploit code.

Affected product: Gitlab Gitlab. 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-2017-0920/ (Markdown: https://insights.sbomify.com/CVE-2017-0920/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-0920
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-0920
- OSV: https://osv.dev/vulnerability/CVE-2017-0920

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-0920/
Summaries are generated and may contain mistakes; the official description above is the record.