# CVE-2023-26130: Other in yhirose/cpp-httplib

> Attackers can inject CRLF characters into HTTP headers via untrusted input, causing logical errors in applications using this C++ library.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 May 2023
- **Updated:** 13 Feb 2025
- **Also known as:** DEBIAN-CVE-2023-26130, GHSA-599g-p68q-2rxv, OESA-2023-1364, OESA-2023-1365, UBUNTU-CVE-2023-26130

## What is CVE-2023-26130?

CVE-2023-26130 is a high-severity vulnerability in yhirose/cpp-httplib, published on 30 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Versions of the package yhirose/cpp-httplib before 0.12.4 are vulnerable to CRLF Injection when untrusted user input is used to set the content-type header in the HTTP .Patch, .Post, .Put and .Delete requests. This can lead to logical errors and other misbehaviors.

**Note:** This issue is present due to an incomplete fix for [CVE-2020-11709](https://security.snyk.io/vuln/SNYK-UNMANAGED-YHIROSECPPHTTPLIB-2366507).

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), CWE-77 (Improper Neutralization of Special Elements used in a Command), CWE-93 (Improper Neutralization of CRLF Sequences)

## Which versions are affected by CVE-2023-26130?

It affects 1 product.


Products: Cpp-Httplib Project Cpp-Httplib.

## How do I fix CVE-2023-26130?

Upgrade to a fixed version.

## Is CVE-2023-26130 being exploited?

There is no known exploitation of CVE-2023-26130 in the wild and no public exploit code.

## Other vulnerabilities in yhirose/cpp-httplib

- [CVE-2025-46728](https://insights.sbomify.com/CVE-2025-46728/): cpp-httplib has Unbounded Memory Allocation in Chunked/No-Length Requests (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-26130 and fix it if it is affected.

What it is: CVE-2023-26130 is a high-severity vulnerability in yhirose/cpp-httplib, published on 30 May 2023. 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-2023-26130 in the wild and no public exploit code.

Affected product: yhirose/cpp-httplib. 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-2023-26130/ (Markdown: https://insights.sbomify.com/CVE-2023-26130/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-26130
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-26130
- OSV: https://osv.dev/vulnerability/CVE-2023-26130

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-26130/
Summaries are generated and may contain mistakes; the official description above is the record.