# CVE-2023-3348: Directory traversal vulnerability in Cloudflare Wrangler

> An attacker on the same network can access files outside the development directory via the local Pages development server in Cloudflare Wrangler.

- **Severity:** Medium 5.7 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 3 Aug 2023
- **Updated:** 9 Oct 2024
- **Also known as:** GHSA-8c93-4hch-xgxp

## What is CVE-2023-3348?

CVE-2023-3348 is a medium-severity path traversal vulnerability in Cloudflare Wrangler, published on 3 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The Wrangler command line tool  (<=wrangler@3.1.0 or <=wrangler@2.20.1) was affected by a directory traversal vulnerability when running a local development server for Pages (wrangler pages dev command). This vulnerability enabled an attacker in the same network as the victim to connect to the local development server and access the victim's files present outside of the directory for the development server.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2023-3348?

2 open source packages ship an affected version, including wrangler. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `wrangler` | npm | All versions | 2.20.1 |
| `wrangler` | npm | All versions | 2.20.1 |

Products: Cloudflare Wrangler.

## How do I fix CVE-2023-3348?

Upgrade wrangler to 2.20.1 or later.

## Is CVE-2023-3348 being exploited?

There is no known exploitation of CVE-2023-3348 in the wild and no public exploit code.

## Other vulnerabilities in Cloudflare Wrangler

- [CVE-2023-7080](https://insights.sbomify.com/CVE-2023-7080/): Arbitrary remote code execution within wrangler dev Workers sandbox (high 8.5)
- [CVE-2026-0933](https://insights.sbomify.com/CVE-2026-0933/): OS Command Injection in `wrangler pages deploy` (high 7.7)
- [CVE-2023-7079](https://insights.sbomify.com/CVE-2023-7079/): Arbitrary remote file read in Wrangler dev server (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3348 and fix it if it is affected.

What it is: CVE-2023-3348 is a medium-severity path traversal vulnerability in Cloudflare Wrangler, published on 3 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-3348 in the wild and no public exploit code.

Affected packages and fixed versions:
- wrangler (npm): affected all versions; fixed in 2.20.1
- wrangler (npm): affected all versions; fixed in 2.20.1

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-2023-3348/ (Markdown: https://insights.sbomify.com/CVE-2023-3348/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3348
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3348
- OSV: https://osv.dev/vulnerability/CVE-2023-3348

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3348/
Summaries are generated and may contain mistakes; the official description above is the record.