# CVE-2024-42392: Improper Neutralization of Delimiters in Mongoose Web Server library

> An attacker can cause a denial of service by triggering an infinite loop in the Mongoose Web Server library via specially crafted input strings.

- **Severity:** Medium 4.0 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Nov 2024
- **Updated:** 8 Sep 2026
- **Also known as:** GHSA-xqwp-cfr5-f9gr

## What is CVE-2024-42392?

CVE-2024-42392 is a medium-severity denial of service vulnerability in Cesanta Mongoose, published on 18 Nov 2024. 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

Improper Neutralization of Delimiters vulnerability in Cesanta Mongoose Web Server v7.14 allows to trigger an infinite loop bug if the input string contains unexpected characters.

Weakness: CWE-140 (Improper Neutralization of Delimiters)

## Which versions are affected by CVE-2024-42392?

It affects 1 product.


Products: Cesanta Mongoose.

## How do I fix CVE-2024-42392?

No fix has been published for CVE-2024-42392 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-42392 being exploited?

There is no known exploitation of CVE-2024-42392 in the wild and no public exploit code.

## Other vulnerabilities in Cesanta Mongoose

- [CVE-2022-25299](https://insights.sbomify.com/CVE-2022-25299/): Arbitrary File Write (critical 9.8)
- [CVE-2020-25756](https://insights.sbomify.com/CVE-2020-25756/): Memory corruption in n/a (critical 9.8)
- [CVE-2019-19307](https://insights.sbomify.com/CVE-2019-19307/): Integer overflow in n/a (critical 9.8)
- [CVE-2019-12951](https://insights.sbomify.com/CVE-2019-12951/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-20353](https://insights.sbomify.com/CVE-2018-20353/): Use after free in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-42392 and fix it if it is affected.

What it is: CVE-2024-42392 is a medium-severity denial of service vulnerability in Cesanta Mongoose, published on 18 Nov 2024. 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-2024-42392 in the wild and no public exploit code.

Affected product: Cesanta Mongoose. 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-2024-42392/ (Markdown: https://insights.sbomify.com/CVE-2024-42392/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-42392
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-42392
- OSV: https://osv.dev/vulnerability/CVE-2024-42392

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-42392/
Summaries are generated and may contain mistakes; the official description above is the record.