# CVE-2022-35507: Other in n/a

> Remote attackers can cause client-side denial of service in Chromium browsers via CRLF injection in Proxmox web interface response headers.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **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:** 4 Dec 2022
- **Updated:** 24 Apr 2025
- **Also known as:** GHSA-xfgp-gpjw-wmqr

## What is CVE-2022-35507?

CVE-2022-35507 is a medium-severity vulnerability in n/a, published on 4 Dec 2022. 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

A response-header CRLF injection vulnerability in the Proxmox Virtual Environment (PVE) and Proxmox Mail Gateway (PMG) web interface allows a remote attacker to set cookies for a victim's browser that are longer than the server expects, causing a client-side DoS. This affects Chromium-based browsers because they allow injection of response headers with %0d. This is fixed in pve-http-server 4.1-3.

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

## Which versions are affected by CVE-2022-35507?

It affects 3 products.


Products: Proxmox Proxmox Mail Gateway, Proxmox Pve Http Server, Proxmox Virtual Environment.

## How do I fix CVE-2022-35507?

No fix has been published for CVE-2022-35507 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-35507 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-35507 exists.

Public exploit code:

- Proxmox - CRLF Injection (nuclei): http/cves/2022/CVE-2022-35507.yaml

## Other vulnerabilities in n/a

- [CVE-2022-35508](https://insights.sbomify.com/CVE-2022-35508/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2015-9057](https://insights.sbomify.com/CVE-2015-9057/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2015-9058](https://insights.sbomify.com/CVE-2015-9058/): Open redirect in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-35507 and fix it if it is affected.

What it is: CVE-2022-35507 is a medium-severity vulnerability in n/a, published on 4 Dec 2022. 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-2022-35507 exists.

Affected product: n/a. 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-2022-35507/ (Markdown: https://insights.sbomify.com/CVE-2022-35507/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-35507
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-35507
- OSV: https://osv.dev/vulnerability/CVE-2022-35507

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-35507/
Summaries are generated and may contain mistakes; the official description above is the record.