# CVE-2023-26138: Other in drogonframework/drogon

> Attackers can inject CRLF characters into HTTP headers via the addHeader function, potentially manipulating request structure or bypassing security controls.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 6 Jul 2023
- **Updated:** 19 Nov 2024
- **Also known as:** GHSA-3jvv-m32r-4hpf

## What is CVE-2023-26138?

CVE-2023-26138 is a medium-severity vulnerability in drogonframework/drogon, published on 6 Jul 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

All versions of the package drogonframework/drogon are vulnerable to CRLF Injection when untrusted user input is used to set request headers in the addHeader function. An attacker can add the \r\n (carriage return line feeds) characters and inject additional headers in the request sent.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), CWE-93 (Improper Neutralization of CRLF Sequences)

## Which versions are affected by CVE-2023-26138?

It affects 1 product.


Products: Drogon Drogon.

## How do I fix CVE-2023-26138?

No fix has been published for CVE-2023-26138 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-26138 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-26138 exists.

## Other vulnerabilities in drogonframework/drogon

- [CVE-2022-25297](https://insights.sbomify.com/CVE-2022-25297/): Arbitrary File Write (high 7.5)
- [CVE-2021-35397](https://insights.sbomify.com/CVE-2021-35397/): Path traversal in n/a (high 7.5)
- [CVE-2023-26137](https://insights.sbomify.com/CVE-2023-26137/): Other in drogonframework/drogon (high 7.2)
- [CVE-2022-3959](https://insights.sbomify.com/CVE-2022-3959/): drogon Session Hash small space of random values (low 3.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-26138 and fix it if it is affected.

What it is: CVE-2023-26138 is a medium-severity vulnerability in drogonframework/drogon, published on 6 Jul 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-26138 exists.

Affected product: drogonframework/drogon. 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-2023-26138/ (Markdown: https://insights.sbomify.com/CVE-2023-26138/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-26138
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-26138
- OSV: https://osv.dev/vulnerability/CVE-2023-26138

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-26138/
Summaries are generated and may contain mistakes; the official description above is the record.