# CVE-2018-3774: Open Redirect in url-parse

> Incorrect URL parsing allows attackers to bypass authentication, trigger SSRF, or cause open redirects in applications using the library.

- **Severity:** Critical 10.0 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Aug 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-3774, GHSA-pv4c-p2j5-38j4, UBUNTU-CVE-2018-3774

## What is CVE-2018-3774?

CVE-2018-3774 is a critical server-side request forgery vulnerability in HackerOne url-parse, published on 12 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open Redirect, Bypass Authentication Protocol.

Weakness: CWE-918 (Server-Side Request Forgery), CWE-601 (URL Redirection to Untrusted Site), CWE-425 (Direct Request)

## Which versions are affected by CVE-2018-3774?

2 open source packages ship an affected version, including url-parse. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `url-parse` | npm | From 1.0.0 | 1.4.3 |
| `url-parse` | npm | From 1.0.0 | 1.4.3 |

Products: Url-Parse Project Url-Parse.

## How do I fix CVE-2018-3774?

Upgrade url-parse to 1.4.3 or later.

## Is CVE-2018-3774 being exploited?

There is no known exploitation of CVE-2018-3774 in the wild and no public exploit code.

## Other vulnerabilities in HackerOne url-parse

- [CVE-2022-0512](https://insights.sbomify.com/CVE-2022-0512/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (high 8.8)
- [CVE-2022-0691](https://insights.sbomify.com/CVE-2022-0691/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (medium 6.5)
- [CVE-2022-0686](https://insights.sbomify.com/CVE-2022-0686/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (medium 6.5)
- [CVE-2022-0639](https://insights.sbomify.com/CVE-2022-0639/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (medium 6.5)
- [CVE-2021-3664](https://insights.sbomify.com/CVE-2021-3664/): Open Redirect in unshiftio/url-parse (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-3774 and fix it if it is affected.

What it is: CVE-2018-3774 is a critical server-side request forgery vulnerability in HackerOne url-parse, published on 12 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-3774 in the wild and no public exploit code.

Affected packages and fixed versions:
- url-parse (npm): affected from 1.0.0; fixed in 1.4.3
- url-parse (npm): affected from 1.0.0; fixed in 1.4.3

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-2018-3774/ (Markdown: https://insights.sbomify.com/CVE-2018-3774/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-3774
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-3774
- OSV: https://osv.dev/vulnerability/CVE-2018-3774

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-3774/
Summaries are generated and may contain mistakes; the official description above is the record.